Grade11 Week 1-10
Which of the following statement is TRUE.
Select one:
a. All of the statements are TRUE.
b. Countable number of values are called discrete variables
c. Non-countable values are called discrete variables
d. Infinite numbers are considered discrete variables.
Answer: Countable number of values are called discrete
variables
Question 2
The speed of cars travelling in the road and the water
consumption of household are examples of
Select one:
a. Discrete Continuous Random Variable
b. Continuous Discrete Random Variable
c. Continuous Random Variable
d. Discrete Random Variables
e. None of the choices
Answer: Continuous Random Variable
Question 3
True or False: The number of questions that you answer
correctly on this quiz is an example of a discrete random variable.
Answer:
false
Question 4
Which of the following is incorrect?
Select one:
a. Probability distribution equals to one.
b. Probability distribution equals to zero.
c. Probability distribution is used to compute discrete
random variables
d. None of the choices
e. Probability distribution is used to compute continuous
random variables
Answer: Probability distribution equals to zero.
Question 5
What is the probability distribution of occurring the all
heads in a toss of three coins?
Select one:
a. 0.1255
b. 0.25
c. 1
d. None of the choices
e. 0
Answer: 0.1255
Short Quiz 1
Which of the following is CORRECT about Sample Space
Select one:
a. Sample space is also known as probability mass function.
b. Sample space is a subset of events.
c. Sample space should be always be a number from zero to
one.
d. Sample space are possible outcomes
Answer: Sample space are possible outcomes
The sum of all the probabilities P(X = x) for all possible
values of a discrete random variable X must equal to _____
Answer: 1
How many possible outcomes when you simultaneously toss
three fair coins.
Answer: 8
Salary, scores and age are examples of answer: continuous..
random variables
Which one of these variables is a not continuous random
variable?
Select one:
a. The number of attendees in an Information Technology
conference.
b. The tuition fee enrolled in different universities
c. The number of volunteers in a community
d. The number of senators elected in the Philippines
Answer: The number of senators elected in the Philippines
Countless number of values are also known as Answer
continuous.. variables.
Which of the following random activity would you define as a
discrete random variable?
Select one:
a. Distance travelled of a tourist bus.
b. Depth of building excavation.
c. None of the choices.
d. Height of students enrolled in an online course.
e. Wind speed during typhoon.
Answer: None of the choices.
The sum of all the probabilities P(X = x) for all possible
values of a discrete random variable X must equal 1.
Select one:
a. The statement is NOT ALWAYS FALSE
b. The statement is TRUE.
c. The statement is FALSE.
d. The statement is NOT ALWAYS TRUE
Answer: The statement is TRUE.
A continuous random variable assigns a whole number to each
possible outcome of an experiment.
Select one:
a. None of the choices
b. The statement has insufficient information.
c. True
d. False
Answer: True
This tells what the possible values of X and how
probabilities are assigned to these values.
Answer: Probability Distribution
Week3 Stats
WEEK 3
Learning Activity 3 AND SHORT QUIZ 3
It is the measure of how many standard deviations below or
above the population mean.
Select one:
a. Median
b. Z-score
c. Normal Distribution Measurement
d. Empirical Rule
Feedback
The correct answer is: Z-score
In an IT Certification Examination, the mean was 75 and the
standard deviation was 5. If Pam z-scored is 1.5, what was her score in the
examination?
Select one:
a. 117.50
b. 487.50
c. None of the choices
d. 82.50
Feedback
The correct answer is: 82.50
Who is the famous mathematician where the normal
distribution curve was named after?
Select one:
a. Carl Friedrich Gauss
b. William Gosset
c. Ronald Fisher
d. John Tukey
Feedback
Your answer is correct.
The correct answer is: Carl Friedrich Gauss
Which of the following is not a characteristics of a normal
distribution.
Select one:
a. Mount-shaped distribution
b. Bell-shaped
c. None of the choices
d. Perfectly asymmetric
Feedback
The correct answer is: Perfectly asymmetric
How many regions can be found at the left side of the normal
distribution curve?
Select one:
a. 3
b. 2
c. 4
d. 1
Feedback
The correct answer is: 3
Short Quiz 3
In a normal distribution curve,
Select one:
a. Mean is equal to Median and Mode
b. None of the choices
c. Mean is equal to Mode
d. Mean is equal to Median
Feedback
The correct answer is: Mean is equal to Median and Mode
It is the measure of how many standard deviations below or
above the population mean.
Select one:
a. Empirical Rule
b. Median
c. Z-score
d. Normal Distribution Measurement
Feedback
The correct answer is: Z-score
Given the set of data:
1, 1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22
Find the lower quartile
Select one:
a. 8
b. 3,4,5,6,7,8,9,10,11,12,
c. 3
d. 0
Feedback
The correct answer is: 8
In an IT Certification Examination, the mean was 50 and the
standard deviation was 3. If Pam z-scored is 1, what was her score in the
examination?
Select one:
a. 53.00
b. None of the choices
c. 80.50
d. 82.50
Feedback
The correct answer is: 53.00
Assuming z-score is -1, which of the following statement is
TRUE.
Select one:
a. All values are greater than the mean.
b. All values are less than the mean.
c. All values are equal to the mean.
d. All values are equal to the z-score
Feedback
The correct answer is: All values are less than the mean.
Given the set of data:
1,1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22
Find the upper quartile
Select one:
a. 13,14,15,14,15,16,17,18,19,20,21,22
b. 18
c. 22
d. 0
Feedback
The correct answer is: 18
Find the median of the following data set.
11, 13, 15, 17, 19, 21, 22, 23, 25, 27, 29, 31, 33, 35, 37,
39, 41, 43, 51, 53, 55, 57, 59
Select one:
a. 36.45
b. 24
c. 30
d. 31
Feedback
The correct answer is: 31
Given the set of data:
1,1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22
How many numbers are in the lower quartile?
Select one:
a. 0
b. 10
c. 6
d. 3,4,5,6,7,8,9,10
Feedback
The correct answer is: 6
Normal Distribution Curve is also called
Select one:
a. Arc-Shaped Curve
b. Bell Curve
c. Basic Curve
d. All of the choices
Feedback
The correct answer is: Bell Curve
In a normal distribution curve, data are divided into 3
equal parts.
Select one:
a. The statement is TRUE.
b. None of the choices
c. The statement is FALSE.
d. The statement is SOMETIMES TRUE depending on the data
set.
Feedback
The correct answer is: None of the choices
Week 5 Stats
Learning Activity 4
True or False: Variance Error is the difference between a
sample statistic used to estimate a population parameter and the actual but
unknown value of the parameter
The correct answer is: FALSE
True or False: Sampling Error is the degree of error
expected for a given sample design
The correct answer is: TRUE
Identify whether each example describes a random sample.
Answer with Yes or No.
The correct answer is: No
Given the following sample data, compute for the true mean.
The answer must have two decimal places.
1 1 1 2 3 4 5 5 5 8 8 8 8
The correct answer is: 4.53
Given the following mean, compute for the Mean of Means. The
answer must have two decimal places.
4.5, 9.2, 9.1, 8.4
The correct answer is: 2.60
Week 5 Stats short quiz 4
Short Quiz 4
Identify whether each example describes a random sample.
Answer with Yes or No
Renmel closes his eyes, opens a book and randomly points to
a word on the page. She repeats the process for 30 times.
The correct answer is: No
True or False: Mean of means is the sum of all means
multiplied by the number of means
The correct answer is: FALSE
It is a part of population intended to represent a
population as a whole.
Select one:
a. Mode
b. Deviation Error
c. Parameter
d. Standard deviation of the distribution of the sample
means
e. Random Sample
f. Mean
g. Sampling Error
h. Population Mean
i. Median
j. Statistics
k. Distribution Error
l. Sample Distribution of sample means
m. Standard Curve
n. Sample
o. Standard Deviation
p. Sample
q. Population
The correct answer is: Sample
Identify whether each example describes a random sample.
Answer with Yes or No
Women who volunteer to take a survey on human rights.
The correct answer is: No
The distribution that describes the spread of the means of
multiple samples from the sample population
Select one:
a. Deviation Error
b. Parameter
c. Sample
d. Standard Deviation
e. Distribution Error
f. Population
g. Random Sample
h. Mode
i. Sampling Error
j. Population Mean
k. Mean
l. Statistics
m. Median
n. Standard deviation of the distribution of the sample
means
o. Sample Distribution of sample means
p. Sample
q. Standard Curve
The correct answer is: Sample Distribution of sample means
Identify whether each example describes a random sample.
Answer with Yes or No.
Each audience in a game show is assigned a number from 111
to 666 and roll three standard dice to choose random contestants.
The correct answer is: Yes
If the standard deviation of a population is 300, and
samples of 25 units each are taken, what is the Standard deviation of the
distribution of the sample means?
The correct answer is: 60
Given the following sample data, compute for the true mean.
The answer should be rounded off to one decimal place.
3 5 5 5 6 6 8 8 13 15 17 30
The correct answer is: 10.8
True or False: People whose names were drawn out of the
survey is an example of a random sample
The correct answer is: TRUE
True or False: As the sample size increases, the standard
error increases.
The correct answer is: FALSE
Learning Activity 6 Stats
To calculate the mean from a sample,
Select one:
a. Get the half of the sum of the all the values
b. Add all the values and divided by the total number of
samples
c. Divide each value with the sum of all values
d. None of the choices
The correct answer is: Add all the values and divided by the
total number of samples
Compute for the point estimate of the population parameter.
Round off your answer to the nearest hundredths or has two decimal places.
Write the measurement at the end of the answer.
Average Speed of a car Car 1 Car 2 Car 3 Car 4
80 kph 75 kph 60 kph 66 kph
The correct answer is: 7 0 . 2 5 k p h
This is defined by two values, between which a population
parameter is said to lie.
Select one:
a. Interval Estimate
b. Points Estimate
c. Coefficient Estimate
d. Point to point Estimate
The correct answer is: Interval Estimate
Compute for the point estimate of the population parameter.
Round off your answer to the nearest hundredths or has two decimal places, if
necessary.
Scores of students in quizzes
The correct answer is: 77.70
Compute for the point estimate of the population parameter
of the grades of students. (Round off your answer to the nearest hundredths.)
The correct answer is: 85.75
Point estimate is
Select one:
a. none of the choices
b. always equal to the mean
c. used to estimate population parameter Correct
d. the number of samples
e. a range of possible values of population mean
Feedback
The correct answer is: used to estimate population parameter
A single value given as an estimate of a parameter of a
population.
Select one:
a. Sample distribution Incorrect
b. Confidence Limit
c. Confidence coefficient
d. Sample Mean
Feedback
The correct answer is: Sample Mean
Short Quiz 6 Stats
Confidence interval is associated by confidence level
Select one:
a. TRUE
b. FALSE
The correct answer is: TRUE
The effectiveness of the sample android application can be
measured by the proportion of mobile users who install the application. To
determine this proportion for a specific android app, the distributed to 500
users and 450 user install the app. The point estimate is ____________.
Select one:
a. .85
b. .80
c. .90
d. .95
The correct answer is: .90
Which measure of tendency is the best estimator?
Select one:
a. Mode
b. Mean
c. Standard Deviation
d. Median
The correct answer is: Mean
Confidence level indicates the level of assurance that
confidence interval encloses the:
Select one:
a. unknown population mean
b. biased sample
c. known population mean
d. unbiased sample
The correct answer is: unknown population mean
Which of the following applies to confidence interval
Select one:
a. Confidence interval is used to the true mean of
population
b. As the confidence interval for a given statistic
increases in length, the confidence level increases
c. Confidence interval is associated by confidence level
d. None of the choices
e. All of the choices
The correct answer is: All of the choices
A 95% confidence interval means 95% of all samples of size n
would fall ______ our confidence interval
Select one:
a. Below
b. Outside
c. None of the choices
d. Within
e. Above
Feedback
The correct answer is: Within
You need to calculate for the confidence interval for the
population mean. The population standard deviation is known. There are 50
sample observations. You will use 95 percent level of confidence. The
appropriate value of z is:
Select one:
a. Cannot be determined
b. 1.64
c. 2.58
d. 1.96
e. 1
The correct answer is: 1.96
Point estimate is always equal to the sampling coefficient.
Select one:
a. FALSE. Change the statement to “Point estimate is equal
to the number of samples”
b. FALSE. Change the statement to “Point estimate is used to
estimate population parameter”
c. TRUE
d. FALSE. Change the statement to “Point estimate is a range
of possible values of population mean”
The correct answer is: FALSE. Change the statement to “Point
estimate is a range of possible values of population mean”
Confidence coefficient is a single value given as an
estimate of a parameter of a population.
Select one:
a. TRUE
b. FALSE. Change “confidence coefficient” to confidence
limit
c. FALSE. Change “confidence coefficient” to sample mean
d. FALSE. Change “confidence coefficient” to Confidence
Limit
The correct answer is: FALSE. Change “confidence
coefficient” to sample mean
The confidence level is expressed as a fraction
Select one:
a. FALSE
The correct answer is: FALSE
Short Quiz 8
The “p hat” is calculated as
Select one:
a. Number of desired elements over the number of desired
outcomes
b. Number of desired outcomes over the number of desired
elements Correct
c. 1- (Number of desired elements over the number of desired
outcomes)
d. (Number of desired outcomes over the number of desired
elements) – 1
Feedback
The correct answer is: Number of desired outcomes over the
number of desired elements
Sampling distribution of proportions is ______________
distributed
Select one:
a. Normally Correct
b. Randomly
c. Evenly
d. Unevenly
Feedback
The correct answer is: Normally
A survey was conducted to 300 Grade 10 students who have
Internet access to determine who access social media websites after attending
classes. Based on the survey, 250 students responded Yes. What is the
population proportion to students who do not access social media after
attending classes?
Select one:
a. 80%
b. 20%
c. 17% Correct
d. 83%
Feedback
The correct answer is: 17%
When the confidence level is 95%, the ____________________
are +- 1.96
Select one:
a. Margin of Errors
b. Confidence coefficients Correct
c. Confidence intervals
d. “p hat” values
Feedback
The correct answer is: Confidence coefficients
Point estimate is
Select one:
a. Always equal to the number or samples
b. A range of possible values for a population parameter.
c. Equal to the population mean
d. A statistical that estimates a population parameter
Correct
Feedback
The correct answer is: A statistical that estimates a
population parameter
The ^p is the ____________ estimate of p.
Select one:
a. balanced
b. unbiased Correct
c. biased
d. inverse
Given n=10, x¯ =28, s=2.0, 95% confidence. Assuming that the
samples come from a normal distribution, find the margin of error.
Select one:
a. 1.24 Correct
b. 26.76
c. 3.16
d. 0.63
Feedback
The correct answer is: 1.24
Given n=10, x¯ =28, s=2.0, 99% confidence. Assuming that the
samples come from a normal distribution, find the interval estimate of the
population mean.
Select one:
a. (11.34, 14.89)
b. (1.63, 2.25)
c. (21.36, 24.63)
d. (26.36, 29.63) Correct
Feedback
The correct answer is: (26.36, 29.63)
What is in the center of the confidence interval?
Select one:
a. Margin of Error
b. Point Estimate Correct
c. Population Parameter
d. Number of samples
Feedback
The correct answer is: Point Estimate
In a survey of 500 individuals, 300 likes to eat dinner in a
restaurant. Estimate the sample proportion ^p of those who like to eat dinner
in a restaurant based on the sample.
Select one:
a. 45%
b. 0.40
c. 55%
d. 0.60 Correct
Feedback
The correct answer is: 0.60
Learning Activity 8 Stats
Margin of error is
Select one:
a. the product of confidence coefficient and standard
deviation divided by the square root of the sample size Correct
b. the quotient of confidence coefficient and standard
deviation multiplied by the square root of the sample size
c. the product of confidence coefficient and square root of
the sample size divided by standard deviation
d. the quotient of confidence coefficient and square root of
the sample size divided standard deviation
Feedback
The correct answer is: the product of confidence coefficient
and standard deviation divided by the square root of the sample size
Given n=100, x¯ =45, s=2.0, 90% confidence. Assuming that
the samples come from a normal distribution, find the interval estimate of the
population mean.
Select one:
a. (42.103, 43.970)
b. (43.355, 46.645)
c. (44.461, 45.329) Incorrect
d. (46.921, 47.727)
Feedback
The correct answer is: (43.355, 46.645)
Given n=100, x¯ =80, s=2.0, 95% confidence. Assuming that
the samples come from a normal distribution, find the margin of error.
Select one:
a. 0.348 Incorrect
b. 0.20
c. 0.392
d. 0.196
Feedback
The correct answer is: 0.392
A survey was conducted from the 250 individuals. Based on
the result of the survey, 170 are satisfied with the current Local Government
administration. Estimate the sample proportion ^p of those who are not
satisfied based on the sample provided.
Select one:
a. 55%
b. 0.32 Correct
c. 0.
d. 0.68
Feedback
The correct answer is: 0.32
A survey was conducted to 110 college students to determine
who are using the Library Resource Center of the university. Based on the
survey, only 30% responded Yes. Based on the survey, how many students are not
using the Library Resource Center?
Select one:
a. 33
b. 30
c. 67 Correct
d. 70
Feedback
The correct answer is: 67
Learning Activity 9 Stats
A survey of 200 people finds that they work on average of 8
hours a day. If the margin of error at 98% confidence level is 1.2 hours. How
do you compute for the lower confidence interval?
Select one:
a. 8 hours less 1.2 hours
b. Z score plus less the square root of 8 hours less 1.2
hours Correct
c. None of the choices
d. 8 hours less 1.2 hours multiplied by the z score at 98%
confidence level
Feedback
The correct answer is: Z score plus less the square root of
8 hours less 1.2 hours
King Lo Electronics claims that the new brand of computer
will last for 25,000 hours. A research company conducted a test on the
information. The company randomly select and test 100 cellular phone. The data
from the sample shows that the mean life of the cellular phone is 20,000 hours,
with a standard deviation of 1000 hours. Determine the 95% confidence interval
of the mean life of the cellular phone.
Select one:
a. (17,482, 18,649)
b. (19,804, 20,196) Correct
c. (23,467, 24,639)
d. (26,928, 27,375)
Feedback
The correct answer is: (19,804, 20,196)
Given the sample size (n=400) and sample proportion
(p=0.56), find the approximate margin of error for the 99% confidence interval:
Select one:
a. 0.043 Incorrect
b. 0.052
c. 0.064
d. 0.074
Feedback
The correct answer is: 0.064
Given the sample size (n=200) and sample proportion
(p=0.70), find the approximate margin of error for the 90% confidence interval:
Select one:
a. 0.053
b. 0.085
c. 0.072 Incorrect
d. 0.039
Feedback
The correct answer is: 0.053
A private organization telephone poll of 750 adults, aged 18
and older, living in the country found that 60% of citizen feel confident in
the accuracy of their doctor's advice, and don't feel the need to check for a
second opinion or do additional research. The margin of error for this survey
was given as ± 20 percentage points. Find a 95% confidence interval estimate of
the percent of adults who feel confident in the accuracy of their doctor’s
advice and don’t feel the need to check for a second opinion.
Select one:
a. (0.490, 0.601)
b. (0.452, 0.538)
c. (0.565, 0.640) Correct
d. (0.316, 0.483)
Feedback
The correct answer is: (0.565, 0.640)
Short Quiz 9
Given the sample size (n=400) and sample proportion
(p=0.70), find the approximate margin of error for the 99% confidence interval:
Select one:
a. 0.086
b. 0.059
c. 0.039 Incorrect
d. 0.330
Feedback
The correct answer is: 0.059
Suppose a new cancer treatment is given to a sample of 500
patients. The treatment was successful for 300 of the patients. Assume that
these patients are representative of the population of individuals who have
this cancer.
Determine a 90% confidence interval for the proportion
successful treated.
Select one:
a. 0.564 < p < 0.640
b. 0.640 < p < 0.742 Incorrect
c. 0.742 < p < 0.834
d. 0.834 < p < 0.927
Feedback
The correct answer is: 0.564 < p < 0.640
A private organization telephone poll of 900 adults, aged 18
and older, living in the country found that 75% of citizen feel confident in
the accuracy of their doctor's advice, and don't feel the need to check for a second
opinion or do additional research. The margin of error for this survey was
given as ±10 percentage points.
Find a 90% upper confidence interval estimate of the percent
of adults who feel confident in the accuracy of their doctor’s advice and don’t
feel the need to check for a second opinion.
Select one:
a. 0.077
b. 0.329 Incorrect
c. 0.834
d. 0.290
Feedback
The correct answer is: 0.077
Lim Electronics claims that the new brand of cellular phone
will last for 80,000 hours. A research company conducted a test on the
information. The company randomly select and test 100 cellular phone. The data
from the sample shows that the mean life of the cellular phone is 60,000 hours,
with a standard deviation of 1500 hours. Determine the 95% confidence interval
of the mean life of the cellular phone.
Select one:
a. (79,301 , 80,890) Incorrect
b. (59,706 , 60,294)
c. (59,301 , 60,890)
d. (79,706 , 80,294)
Feedback
The correct answer is: (59,706 , 60,294)
A survey of 900 female finds that they sleep on average of 8
hours a day. If the margin of error at 95% confidence level is 1.3 hours. Find
the confidence interval?
Select one:
a. 4.50 hours < p < 5.89 hours
b. 6.70 hours < p < 9.30 hours Correct
c. 8.66 hours < p < 11.26 hours
d. 7.34 hours < p < 8.66 hours
Feedback
The correct answer is: 6.70 hours < p < 9.30 hours
Given the sample size (n=300) and sample proportion
(p=0.56), find the approximate margin of error for the 90% confidence interval:
Select one:
a. 0.055
b. 0.069
c. 0.047 Correct
d. 0.039
Feedback
The correct answer is: 0.047
Given the problem in item 9, what does the answer tells
about?
Select one:
a. Lim Electronics can use the survey conducted for their
advertisements.
b. The confidence interval does not support the claim of Lim
Electronics.
c. The confidence interval support the claim of Lim
Electronics. Incorrect
d. The information is not sufficient to conclude.
Feedback
The correct answer is: The confidence interval does not
support the claim of Lim Electronics.
A survey of 900 people finds that they work on average of 9
hours a day. If the margin of error at 98% confidence level is 1.5 hours. What
is the solution to find the lower confidence interval?
Select one:
a. Z score plus less the square root of 9 hours less 1.5
hours
b. None of the choices
c. 9 hours less 1.5 hours Correct
d. All of the choices
e. 9 hours less 1.5 hours multiplied by the z score at 98%
confidence level
A private organization telephone poll of 900 adults, aged 18
and older, living in the country found that 75% of citizen feel confident in
the accuracy of their doctor's advice, and don't feel the need to check for a
second opinion or do additional research. The margin of error for this survey was
given as ±10 percentage points.
Find a 90% lower confidence interval estimate of the percent
of adults who feel confident in the accuracy of their doctor’s advice and don’t
feel the need to check for a second opinion.
Select one:
a. 0.0726
b. 0.8932
c. 0.4508 Incorrect
d. 0.0934
Feedback
The correct answer is: 0.0726
Suppose a new cancer treatment is given to a sample of 500
patients. The treatment was successful for 300 of the patients. Assume that
these patients are representative of the population of individuals who have
this cancer.
Calculate the sample proportion that was successfully
treated.
Select one:
a. 0.85 Incorrect
b. 0.72
c. 0.30
d. 0.60
Feedback
The correct answer is: 0.60
Learning Activity 12 Stats
In hypothesis testing, the computed statistics is compared
to the critical value for decision making.
Select one:
a. The statement is TRUE. Correct
b. The statement is FALSE.
Feedback
The correct answer is: The statement is TRUE.
This separates the rejection region to the region where we
do not reject the null hypothesis.
Select one:
a. Z score
b. Null value Incorrect
c. Critical value
d. chi value
The correct answer is: Critical value
Given a=0.05 and the test statistics, decide whether the
null hypothesis is to be rejected or accepted:
– 4
Select one:
a. Do not Reject
b. Reject Correct
c. Cannot be determined
Feedback
The correct answer is: Reject
St. Therese senior high school have an average achievement
test score of 96. From a random sample of 49 students St. Therese students we
find the average achievement test score to be 98 with a standard deviation of
88. We want to know if these high school students are representative of the
overall population. What can we conclude based?
Select one:
a. Accept null hypothesis
b. Reject null hypothesis
c. Accept alternative hypothesis Incorrect
d. Reject alternative hypothesis
Feedback
The correct answer is: Accept null hypothesis
Given a=0.05 and the test statistics, decide whether the
null hypothesis is to be rejected or accepted:
2.35
Select one:
a. Cannot be determined
b. Reject
c. Do not Reject Incorrect
Feedback
The correct answer is: Reject
Suppose that the z is the test statistics for hypothesis
testing, calculate the value of the z for each of the following. Express your
answer in 2 decimal places. µ = 25, s = 5, n = 80, x¯ = 23.4
Answer:
-5
Incorrect
Feedback
The correct answer is: -2.86
Suppose that the z is the test statistics for hypothesis
testing, calculate the value of the z for each of the following. Express your
answer in 2 decimal places. µ = 77, s = 6, n = 109, x¯ = 78.2
Answer:
-12.83
Incorrect
Feedback
The correct answer is: 2.09
Short Quiz 12
Consider the scenario: In a recent survey, 320 persons out
of 35 reported that they prefer to ride in a public utility air-conditioned
vehicle rather than a jeepney. What is the value of the test statistics?
Select one:
a. 3.49 Incorrect
b. – 1.85
c. – 1.85
d. – 1.33
Feedback
The correct answer is: – 1.85
Supposed that the z is the test statistics for hypothesis
testing, calculate the value of the z for each of the following. Express your
answer in 2 decimal places.
µ = 8.5, s = 4, n = 99, x¯ = 7.2
Answer:
34.32
Incorrect
Feedback
The correct answer is: -3.23
Given a=0.05 and the test statistics, decide whether the
null hypothesis is to be rejected or accepted:
3.31
Select one:
a. Cannot be determined
b. Reject Correct
c. Do not Reject
Consider the scenario: In a recent survey, 320 persons out
of 35 reported that they prefer to ride in a public utility air-conditioned
vehicle rather than a jeepney.
What can we conclude based the value of the test statistics?
Select one:
a. Reject null hypothesis
b. Accept alternative hypothesis Incorrect
c. Reject alternative hypothesis
d. Accept null hypothesis
Feedback
The correct answer is: Accept null hypothesis
Values supporting the ___________________ occurs in the
rejection region.
Select one:
a. Critical values
b. Alternative hypothesis and critical values Incorrect
c. Null hypothesis
d. Null hypothesis and critical values
e. Alternative hypothesis
Feedback
The correct answer is: Null hypothesis and critical values
A sample is small when n=30.
Select one:
a. The statement is TRUE. Incorrect
b. The statement is FALSE. Replace the letter n with letter
x.
c. The statement is FALSE. Replace the = with =
d. The statement is FALSE. Replace the word small with
large.
Feedback
The correct answer is: The statement is FALSE. Replace the
word small with large.
In hypothesis testing, the computed statistics is compared
to the critical value for decision making.
Select one:
a. The statement is FALSE.
b. The statement is TRUE. Correct
Feedback
The correct answer is: The statement is TRUE.
Given a=0.05 and the test statistics, decide whether the
null hypothesis is to be rejected or accepted:
0.131
Select one:
a. Do not Reject
b. Reject Incorrect
c. Cannot be determined
Feedback
The correct answer is: Do not Reject
Given a=0.05 and the test statistics, decide whether the
null hypothesis is to be rejected or accepted:
1.11
Select one:
a. Cannot be determined
b. Do not Reject Correct
c. Reject
Feedback
The correct answer is: Do not Reject
Supposed that the z is the test statistics for hypothesis
testing, calculate the value of the z for each of the following. Express your
answer in 2 decimal places.
µ = 77, s = 6, n = 109, x¯ = 78.2
Answer:
56.23
Incorrect
Feedback
The correct answer is: 2.09
Supposed that the z is the test statistics for hypothesis
testing, calculate the value of the z for each of the following. Express your
answer in 2 decimal places.
µ = 8, s = 4, n = 99, x¯ = 7.2
Answer:
-1.99
Correct
Feedback
The correct answer is: -1.99
Given a=0.05 and the test statistics, decide whether the
null hypothesis is to be rejected or accepted:
1.20
Select one:
a. Cannot be determined
b. Reject
c. Do not Reject Correct
Feedback
The correct answer is: Do not Reject
Given a=0.05 and the test statistics, decide whether the
null hypothesis is to be rejected or accepted:
– 0.6
Select one:
a. Cannot be determined
b. Do not Reject Correct
c. Reject
Feedback
The correct answer is: Do not Reject
Learning Activity 13 Stats
A Police Sub Station claims that 45% of crimes are related
to cell phone snatching. In a random sample of 150 accidents, it is found that
60 of the accidents are related to cell phone snatching.
What is the standard error of the proportion?
Select one:
a. 0.033
b. 0.028
c. 0.066 Incorrect
d. 0.041
Feedback
The correct answer is: 0.041
A Police Sub Station claims that 45% of crimes are related
to cell phone snatching. In a random sample of 150 accidents, it is found that
60 of the accidents are related to cell phone snatching.
What is the observed value of the sample proportion?
Select one:
a. 0.932
b. 0.400
c. 0.783
d. 0.600 Incorrect
Feedback
The correct answer is: 0.400
A businessman is increasing his price for processed food,
claiming that the cost of labor and material is going up and accounts for 75%
of his budget. In a random sample of 10 of the processed food, it is found out
that in 6 of the processed food, the cost of the material is higher.
What is the standard error of the proportion?
Select one:
a. 0.442 Incorrect
b. 0.391
c. 0.137
d. 0.296
Feedback
The correct answer is: 0.137
A businessman is increasing his price for processed food,
claiming that the cost of labor and material is going up and accounts for 75%
of his budget. In a random sample of 10 of the processed food, it is found out
that in 6 of the processed food, the cost of the material is higher.
At the 5% level of significance, test the
contractor/engineer’s claim. Based on the test, what can you conclude?
Select one:
a. Reject the null hypothesis
b. Accept the null hypothesis Correct
Feedback
The correct answer is: Accept the null hypothesis
A Police Sub Station claims that 45% of crimes are related
to cell phone snatching. In a random sample of 150 accidents, it is found that
60 of the accidents are related to cell phone snatching.
At the 10% level of significance, test the Police Sub
Station claims. Based on the test, what can you conclude?
Select one:
a. Accept the null hypothesis Correct
b. Reject the null hypothesis
Feedback
The correct answer is: Accept the null hypothesis
A Police Sub Station claims that 45% of crimes are related
to cell phone snatching. In a random sample of 150 accidents, it is found that
60 of the accidents are related to cell phone snatching.
What is the test statistic for this scenario?
Select one:
a. -0.066
b. 2.112
c. -1.231
d. 1.992 Correct
Feedback
The correct answer is: 1.992
A businessman is increasing his price for processed food,
claiming that the cost of labor and material is going up and accounts for 75%
of his budget. In a random sample of 10 of the processed food, it is found out
that in 6 of the processed food, the cost of the material is higher.
What is the test statistic for this scenario?
Select one:
a. 0.899
b. 1.203
c. 0.996
d. 1.095 Correct
Feedback
The correct answer is: 1.095
Short Quiz 13 Stats
The traffic management office claims that 65% of road
accidents are related to motorcycles. In a random sample of 200 accidents, it
is found that 135 of the accidents are related to motorcycles.
At the 10% level of significance, test the traffic
management office’s claim. Based on the test, what can you conclude?
Select one:
a. Accept the null hypothesis Correct
b. Reject the null hypothesis
Feedback
The correct answer is: Accept the null hypothesis
A building contractor/engineer is increasing his price for
building projects, claiming that the cost of labor and material is going up and
accounts for 65% of his budget. In a random sample of 30 of his projects it is
found that in 20 of the projects the cost of the material is higher.
What is the test statistic for this scenario?
Select one:
a. 0.983
b. 2.181
c. 3.004
d. 1.191 Correct
Feedback
The correct answer is: 1.191
A building contractor/engineer is increasing his price for
building projects, claiming that the cost of labor and material is going up and
accounts for 65% of his budget. In a random sample of 30 of his projects it is
found that in 20 of the projects the cost of the material is higher.
What is the standard error of the proportion?
Select one:
a. 0.087 Correct
b. 0.0632
c. 0.032
d. 0.051
Feedback
The correct answer is: 0.087
About 30% of the male population living in an urban area
smokes cigarette. A researcher believes that male aged 16-30 are more likely
smokes cigarette than other ages in the urban area population. The researcher
surveys 300 male aged 16-30 and finds that 80 of them smokes cigarette:
What is the standard error of the proportion?
Select one:
a. 0.041
b. 0.089
c. 0.026 Correct
d. 0.011
Feedback
The correct answer is: 0.026
About 30% of the male population living in an urban area
smokes cigarette. A researcher believes that male aged 16-30 are more likely
smokes cigarette than other ages in the urban area population. The researcher
surveys 300 male aged 16-30 and finds that 80 of them smokes cigarette:
What is the test statistic for this scenario?
Select one:
a. -2.729
b. -0.998
c. -3.661
d. -1.260 Correct
Feedback
The correct answer is: -1.260
About 30% of the male population living in an urban area
smokes cigarette. A researcher believes that male aged 16-30 are more likely
smokes cigarette than other ages in the urban area population. The researcher
surveys 300 male aged 16-30 and finds that 80 of them smokes cigarette:
What is the observed value of the sample proportion?
Select one:
a. 0.372
b. 0.419
c. 0.267 Correct
d. 0.189
Feedback
The correct answer is: 0.267
A building contractor/engineer is increasing his price for
building projects, claiming that the cost of labor and material is going up and
accounts for 65% of his budget. In a random sample of 30 of his projects it is
found that in 20 of the projects the cost of the material is higher.
What is the observed value of the sample proportion?
Select one:
a. 0.667 Correct
b. 0.429
c. 0.739
d. 0.921
Feedback
The correct answer is: 0.667
The traffic management office claims that 65% of road
accidents are related to motorcycles. In a random sample of 200 accidents, it
is found that 135 of the accidents are related to motorcycles.
What is the test statistic for this scenario?
Select one:
a. 0.0548
b. 0.0808
c. 0.0993
d. 0.0741 Correct
Feedback
The correct answer is: 0.0741
A building contractor/engineer is increasing his price for
building projects, claiming that the cost of labor and material is going up and
accounts for 65% of his budget. In a random sample of 30 of his projects it is
found that in 20 of the projects the cost of the material is higher.
At the 5% level of significance, test the
contractor/engineer’s claim. Based on the test, what can you conclude?
Select one:
a. Accept the null hypothesis Correct
b. Reject the null hypothesis
Feedback
The correct answer is: Accept the null hypothesis
The traffic management office claims that 65% of road
accidents are related to motorcycles. In a random sample of 200 accidents, it
is found that 135 of the accidents are related to motorcycles.
What is the observed value of the sample proportion?
Select one:
a. 0.963
b. 0.675 Correct
c. 0.367
d. 0.822
Feedback
The correct answer is: 0.675
Short Quiz 13 Stats
The traffic management office claims that 65% of road
accidents are related to motorcycles. In a random sample of 200 accidents, it
is found that 135 of the accidents are related to motorcycles.
At the 10% level of significance, test the traffic
management office’s claim. Based on the test, what can you conclude?
Select one:
a. Accept the null hypothesis Correct
b. Reject the null hypothesis
Feedback
The correct answer is: Accept the null hypothesis
A building contractor/engineer is increasing his price for
building projects, claiming that the cost of labor and material is going up and
accounts for 65% of his budget. In a random sample of 30 of his projects it is
found that in 20 of the projects the cost of the material is higher.
What is the test statistic for this scenario?
Select one:
a. 0.983
b. 2.181
c. 3.004
d. 1.191 Correct
Feedback
The correct answer is: 1.191
A building contractor/engineer is increasing his price for
building projects, claiming that the cost of labor and material is going up and
accounts for 65% of his budget. In a random sample of 30 of his projects it is
found that in 20 of the projects the cost of the material is higher.
What is the standard error of the proportion?
Select one:
a. 0.087 Correct
b. 0.0632
c. 0.032
d. 0.051
Feedback
The correct answer is: 0.087
About 30% of the male population living in an urban area
smokes cigarette. A researcher believes that male aged 16-30 are more likely
smokes cigarette than other ages in the urban area population. The researcher
surveys 300 male aged 16-30 and finds that 80 of them smokes cigarette:
What is the standard error of the proportion?
Select one:
a. 0.041
b. 0.089
c. 0.026 Correct
d. 0.011
Feedback
The correct answer is: 0.026
About 30% of the male population living in an urban area
smokes cigarette. A researcher believes that male aged 16-30 are more likely
smokes cigarette than other ages in the urban area population. The researcher
surveys 300 male aged 16-30 and finds that 80 of them smokes cigarette:
What is the test statistic for this scenario?
Select one:
a. -2.729
b. -0.998
c. -3.661
d. -1.260 Correct
Feedback
The correct answer is: -1.260
About 30% of the male population living in an urban area
smokes cigarette. A researcher believes that male aged 16-30 are more likely
smokes cigarette than other ages in the urban area population. The researcher
surveys 300 male aged 16-30 and finds that 80 of them smokes cigarette:
What is the observed value of the sample proportion?
Select one:
a. 0.372
b. 0.419
c. 0.267 Correct
d. 0.189
Feedback
The correct answer is: 0.267
A building contractor/engineer is increasing his price for
building projects, claiming that the cost of labor and material is going up and
accounts for 65% of his budget. In a random sample of 30 of his projects it is
found that in 20 of the projects the cost of the material is higher.
What is the observed value of the sample proportion?
Select one:
a. 0.667 Correct
b. 0.429
c. 0.739
d. 0.921
Feedback
The correct answer is: 0.667
The traffic management office claims that 65% of road
accidents are related to motorcycles. In a random sample of 200 accidents, it
is found that 135 of the accidents are related to motorcycles.
What is the test statistic for this scenario?
Select one:
a. 0.0548
b. 0.0808
c. 0.0993
d. 0.0741 Correct
Feedback
The correct answer is: 0.0741
A building contractor/engineer is increasing his price for
building projects, claiming that the cost of labor and material is going up and
accounts for 65% of his budget. In a random sample of 30 of his projects it is
found that in 20 of the projects the cost of the material is higher.
At the 5% level of significance, test the
contractor/engineer’s claim. Based on the test, what can you conclude?
Select one:
a. Accept the null hypothesis Correct
b. Reject the null hypothesis
Feedback
The correct answer is: Accept the null hypothesis
The traffic management office claims that 65% of road
accidents are related to motorcycles. In a random sample of 200 accidents, it
is found that 135 of the accidents are related to motorcycles.
What is the observed value of the sample proportion?
Select one:
a. 0.963
b. 0.675 Correct
c. 0.367
d. 0.822
Feedback
The correct answer is: 0.675
The traffic management office claims that 65% of road
accidents are related to motorcycles. In a random sample of 200 accidents, it
is found that 135 of the accidents are related to motorcycles.
What is the standard error of the proportion?
Select one:
a. 0.062
b. 0.077
c. 0.034 correct
d. 0.045
Short Quiz 15
Describe the relationship based when r value = 0.01
Select one:
a. No apparent correlation Correct
b. Weak positive correction
c. Strong positive correction
d. Minimal positive correction
Feedback
The correct answer is: No apparent correlation
Linear correlation coefficient is always a value between
____ and ____.
Select one:
a. 0, 100 Incorrect
b. 1, 100
c. +1, -1
d. 0, 1
Feedback
The correct answer is: +1, -1
Year and household monthly water consumption in the
Philippines
Select one:
a. Water consumption is the explanatory variable and year is
the response variable Incorrect
b. Year is the explanatory variable and water consumption is
the response variable
c. Cannot be determined
Feedback
The correct answer is: Year is the explanatory variable and
water consumption is the response variable
Describe the relationship based on the r-value r=0,
Select one:
a. No relationship
b. Deterministic relationship Incorrect
c. Weak relationship
d. Strong relationship
Feedback
The correct answer is: No relationship
The value of a perfect positive coefficient is ________.
Select one:
a. A positive number greater than 1
b. Equal to zero.
c. None of the choices
d. Equal to 1.
e. A positive number greater than 0. Incorrect
Feedback
The correct answer is: Equal to 1.
Describe the relationship based when r value = 0.75
Select one:
a. Minimal positive correction Incorrect
b. Weak positive correction
c. No apparent correlation
d. Strong positive correction
Feedback
The correct answer is: Strong positive correction
The variable that causes an effect
Select one:
a. Response variable
b. Explanatory variable Correct
c. Trend variable
d. Correlation variable
Feedback
The correct answer is: Explanatory variable
This pattern is produced when the score of one observation
is high, the score of the other observation to be high.
Select one:
a. XY Plot
b. Positive Correlation
c. Direct Correlation Incorrect
d. Negative Correlation
Feedback
The correct answer is: Positive Correlation
Year and household monthly water consumption in the
Philippines
Select one:
a. Water consumption is the explanatory variable and year is
the response variable Incorrect
b. Cannot be determined
c. Year is the explanatory variable and water consumption is
the response variable
Feedback
The correct answer is: Year is the explanatory variable and
water consumption is the response variable
The variable that reflects the effect
Select one:
a. Explanatory variable
b. Response variable Correct
c. Correlation variable
d. Trend variable
Feedback
The correct answer is: Response variable
Learning Activity 15 Stats
Describe the relationship based when r value = 0.63
Select one:
a. Minimal positive correction
b. Strong positive correction Correct
c. No apparent correlation
d. Weak positive correction
Feedback
The correct answer is: Strong positive correction
The symbol used to measure the strength and direction of a
linear correlation
Select one:
a. r2
b. r
c. XY
d. None of the choices Incorrect
Feedback
The correct answer is: r
It is also called independent variable
Select one:
a. Explanatory variable
b. Response variable Incorrect
c. Trend variable
d. Correlation variable
Feedback
The correct answer is: Explanatory variable
Salary and number of years of experience
Select one:
a. Number of years is the explanatory variable and salary is
the response variable Correct
b. Salary is the explanatory variable and number of years is
the response variable
c. Cannot be determined
Feedback
The correct answer is: Number of years is the explanatory
variable and salary is the response variable
Describe the relationship based when r value = 0.20
Select one:
a. No apparent correlation
b. Minimal positive correction Incorrect
c. Weak positive correction
d. Strong positive correction
Feedback
The correct answer is: Weak positive correction
Expenditure is an example of a
Select one:
a. Trend variable
b. Explanatory variable
c. Correlation variable
d. Response variable Correct
Feedback
The correct answer is: Response variable
Short Quiz 5 Stats
True or False: Empirical Rule states that 68% of the data
falls within the 1 standard deviation.
The correct answer is: FALSE
True or False: In order to apply the Central Limit Theorem,
a sample size must be greater than or equal to 20.
The correct answer is: FALSE
True or False: In Central Limit Theorem, the standard
deviation of the distribution of means is estimated by dividing the standard
deviation of the population by the square of the sample size.
The correct answer is: FALSE
True or False: A random sample of size 49 is selected from a
known population with a mean of 29 and a standard deviation of 3.3. Samples of
the same size are repeatedly collected, allowing a sampling distribution of
sample means to be drawn. The sampling distribution of sample mean will be
approximately a normal curve.
The correct answer is: TRUE
Margin of Error is the value that _______________ from the
mean to identify the confidence interval.
A: add/subtract
In a normal curve, a _____ of 1 means 1 deviation data are
above the average.
The correct answer is: Z score
Empirical rule states that _______ % of data falls within 2
standard deviation.
The correct answer is: 95
True or False: Standard deviation of a distribution of means
is the standard error of the mean.
The correct answer is: TRUE
True or False: If the population is normally distributed,
the sampling distribution of sample mean is equal to 1.
A: false
If there are 2 volunteers that are randomly selected from
population of 10 for each sample, how many will be the possible samples?
A: 45
The correct answer is: FALSE
The average of the population.
The correct answer is: Mean
PROBLEM SOLVING: Write the answer corresponds to the
problem.
REMINDERS
If the answer requires decimals, express your answer in 2
decimal places.
If your answer is more than 3 digits, DO NOT INCLUDE THE
COMMA.
If there are three students that are randomly selected from
population of 20 for each sample, how many possible samples will there be?
The correct answer is: 1140
True or False: In Central Limit Theorem, the mean of the
sampling distribution of the mean is equal to the population mean.
The correct answer is: TRUE
It is located at the middle of the normal curve.
The correct answer is: Mean
Bell shaped curve.
The correct answer is: Normal Curve
In a normal curve, the mean always has a z score of ____
The correct answer is: 0
Week 6 Learning Activity 5 Stats Different questions.
Comment below yung questions kapag wala pa rin dito.
If the population is normally distributed,
Select one:
a. All of the choices
b. The sampling distribution of sample mean is normal
Correct
c. Standard deviation is equal to Mean
d. Standard deviation is distributed along the normal curve
Feedback
The correct answer is: The sampling distribution of sample
mean is normal
Standard deviation of a distribution of means is the
standard error of the mean.
Select one:
a. The statement is TRUE Correct
b. None of the choices
c. The statement is FALSE
d. The statement do not have sufficient information to
conclude
The correct answer is: The statement is TRUE
A random sample of size is 50 is selected from a known
population with a mean of 13 and a standard deviation of 3.3. Samples of the
same size are repeatedly collected, allowing a sampling distribution of sample
means to be drawn. What is the approximate standard deviation of the sample
means?
Select one:
a. 12.692
b. 0.066
c. 0.467 Correct
d. 15.15
Feedback
The correct answer is: 0.467
A random sample of size 50 is selected from a known
population with a mean of 25 and a standard deviation of 5.2. Samples of the
same size are repeatedly collected, allowing a sampling distribution of sample
means to be drawn. What does the problem tells us?
Select one:
a. All of the above statements does not describe the problem
b. Standard deviation of the sample mean is calculated by
5.2 divided by size of the sample which is 50
c. The sampling distribution of sample mean will be
approximately a normal curve
d. Z score can be calculated by dividing 25 by the size of
samples which is 50
Answer: c. The sampling distribution of sample mean will be
approximately a normal curve
If there are 5 students that are randomly selected from
population of 10 for each sample, how many will be the possible samples?
Select one:
a. 250
b. 126
c. 50
d. 252
Answer: 252
In Central Limit Theorem, the standard deviation of the
distribution of means is estimated by
Select one:
a. Mean of the population multiplied by the standard
deviation of the population
b. Dividing the standard deviation of the population by the
square root of the sample size
c. Dividing the mean of the population by the square root of
the deviation of the population
d. Mean of the population divided by the mean of the
sampling distribution
Answer:Dividing the standard deviation of the population by
the square root of the sample size
Which of the following applies to Central Limit Theorem?
Select one:
a. None of the answers is correct.
b. All of the answers are correct.
c. Distribution of sample means may be assumed normal as
long as sample size is greater than or equal to 30.
d. When the sample size is large or above 30, the population
is not normal Incorrect
e. Population is normally distributed when standard
deviation is large
Feedback
The correct answer is: Distribution of sample means may be
assumed normal as long as sample size is greater than or equal to 30.
Short Quiz 7 Stats
Margin of Error is the value that ______ from the mean to
identify the confidence interval.
Select one:
a. Subtracted
b. Added
c. None of the choices
d. Added and subtracted
The correct answer is: Added and subtracted
Compute for the confidence intervals of the following data:
Mean = 88
Standard deviation = 6
Sample size = 100
Confidence level = 95%
Select one:
a. 73.89, 79.89
b. 80.08, 84.23
c. 89.05, 92.45
d. 86.82, 89.18
The correct answer is: 80.08, 84.23
The number of degrees of freedom is ________ the sample
size.
Select one:
a. None of the choices
b. Greater than
c. Equal to
d. Less than
The correct answer is: Less than
Compute for the confidence intervals of the following data:
Mean = 66 Standard deviation = 5 Sample size = 100 Confidence coefficient =
1.645
Select one:
a. 70.04, 71.34
b. 71.90, 72.22
c. 69.33, 70.02
d. 65.18, 66.82
The correct answer is: 65.18, 66.82
Find the point estimate of the population parameter of the
grades of students. The answer must be rounded off to the nearest hundredths.
The correct answer is: 8 6 . 2 5
The range of possible values expected to capture the
population mean is called the Margin of Error.
Select one:
a. TRUE
b. FALSE
The correct answer is: FALSE
Which of the following does not describes a T distribution?
Select one:
a. None of the choices
b. Bell shaped curve
c. Symmetrical
d. Mean of Means is equal to 0
The correct answer is: Mean of Means is equal to 0
Compute for the margin of error given the following data:
Mean = 80
Standard deviation = 4
Sample size = 100
Confidence level = 95%
Note that the answer must be rounded off to the nearest
hundredths.
Answer:
Incorrect
Feedback
The correct answer is: 0.78
Which of the following is used to estimate population
parameter?
Select one:
a. Point Estimate
b. Central Limit Theorem Estimate Incorrect
c. Mean Estimate
d. Biased Estimate
Feedback
The correct answer is: Point Estimate
Mean of means is also called
Select one:
a. Unbiased estimate
b. Interval Estimate Incorrect
c. Point Estimate
d. Population Mean
Feedback
The correct answer is: Point Estimate
Compute for the margin of error given the following data:
Mean = 77
Standard deviation = 3
Sample size = 100
Confidence coefficient = 2.58
Note that the answer must be rounded off to the nearest
hundredths.
Answer:
Incorrect
Feedback
The correct answer is: 0.77
Learning activity 7 Stats
Compute for the confidence intervals of the following data:
Mean = 66
Standard deviation = 3
Sample size = 100
Confidence level = 95%
Select one:
a. 66.03, 69.03
b. 64.04, 67.96
c. 65.41, 66.59
d. 69.03, 70.99
The correct answer is: 65.41, 66.59
Common choices for the confidence level.
Select one:
a. 68%, 95%, 99.7%
b. 90%, 95%, 99%
c. 95%, 99%, 100%
d. 0%, 50%, 100%
The correct answer is: 90%, 95%, 99%
In T distribution, if we increase the number of observations
Select one:
a. the distribution approaches the shape of a normal
distribution
b. the mean approaches zero
c. the curve lies within the horizontal axis
d. the mean increases
e. all of the choices
The correct answer is: the distribution approaches the shape
of a normal distribution
A single value given as an estimate of a parameter of a
population.
Select one:
a. Confidence Limit
b. Sample Mean Correct
c. Sample distribution
d. Confidence coefficient
Feedback
The correct answer is: Sample Mean
For example, a 90% confidence interval covers 90% of the
normal curve, so the probability of observing a value outside of this area is
____________.
Select one:
a. Less than 10%
b. Higher than the 2 nd standard deviation Incorrect
c. Greater than 10%
d. Lower than the 2 nd standard deviation
Feedback
The correct answer is: Less than 10%
This is the value that is added to and subtracted from the
mean to identify the confidence interval.
Select one:
a. Confidence Level
b. Margin of Error
c. Confidence Interval Incorrect
d. Standard Deviation Error
Feedback
The correct answer is: Margin of Error
Learning Activity 10 Stats
Find the sample size given 95% confidence, Margin of Error =
0.15 and p ^ =0.25.
Select one:
a. 34 Incorrect
b. 33
c. 31
d. 32
Feedback
The correct answer is: 33
Find the sample size given 90% confidence, Margin of Error =
0.15 and ^p =0.25.
Select one:
a. 20 Incorrect
b. 22
c. 23
d. 21
Feedback
The correct answer is: 23
Find the sample size given 99% confidence, Margin of Error =
0.10 and ^p =0.35.
Select one:
a. 389
b. 215 Incorrect
c. 139
d. 152
Feedback
The correct answer is: 152
Find the sample size given 99% confidence, Margin of Error =
0.18 and ^p =0.30.
Select one:
a. 41
b. 42
c. 44 Incorrect
d. 43
Feedback
The correct answer is: 43
The Engineer of the building wants to use the proportion of
the population to determine the sample size needed to interview regarding their
idea about the new color design of the building. He wants to be able to assure
with probability 0.90 that his error will be most 0.10. Similar surveys during
past year that 85% approved the new color design. How large a sample does the
Engineer need?
Select one:
a. 278 Incorrect
b. 2,145
c. 1,372
d. 196
Feedback
The correct answer is: 196
Short Quiz 11 Stats
Determine whether each of the following is a null of an
alternative hypothesis:
The proportion of computer in the software laboratory is
lower than the total number of BS IT students in the university.
Answer:
alternative hypothesis
Correct
Feedback
The correct answer is: Alternative hypothesis
The alternative hypothesis and null hypothesis should be
________________.
Select one:
a. Mutually exclusive
b. All of the choices
c. None of the choices
d. Mutually inclusive Correct
Feedback
The correct answer is: Mutually inclusive
Determine whether each of the following is a null of an
alternative hypothesis:
The proportion of an employee income is greater than the
monthly expenses of the employee.
Answer:
null hypothesis
Incorrect
Feedback
The correct answer is: Alternative hypothesis
William collected a random sample of 88 people, asking how
many times they open ABC web site per day on average, and calculated x¯ =
50.30. ABC suggests that µ = 55, and s = 10. William thinks the actual mean is
less than the website owner claims. What is the null and alternative
hypothesis?
Select one:
a. 55
b. Null hypothesis µ = 55, Alternative hypothesis µ < 55
c. Null hypothesis µ ? 55, Alternative hypothesis µ
d. Null hypothesis µ > 55, Alternative hypothesis µ = 55
e. 55, Alternative hypothesis µ ? 55 Correct
f. Null hypothesis µ
Feedback
The correct answer is: Null hypothesis µ = 55, Alternative
hypothesis µ < 55
A type of test that is denoted by the symbol Ho.
Select one:
a. Rejection hypothesis Incorrect
b. Statistical hypothesis
c. Alternative hypothesis
d. Null hypothesis
Feedback
The correct answer is: Null hypothesis
The probability of making type I error is
Select one:
a. ß
b. 1- a
c. 1- ß
d. a Correct
e. µ - a
Feedback
The correct answer is: a
For the 99% confidence level,
Select one:
a. a
b. a
c. a
d. 0.001
e. a
f. 0.010
g. 0.005
h. 0.025 Correct
Feedback
The correct answer is: 0.010
Determine whether each of the following is a null of an
alternative hypothesis:
A police precinct claims that there is ten crimes on the
average are reported.
Answer:
alternative hypothesis
Incorrect
Feedback
The correct answer is: Null hypothesis
This refers to the area where the value of the test
statistic lies for which we will reject the null hypothesis.
Select one:
a. Rejection region and Null region
b. Rejection region and Critical region Correct
c. Null region and Critical region
d. Null region
e. Critical region
f. None of the choices
g. Rejection region
h. All of the choices
Feedback
The correct answer is: Rejection region and Critical region
Learning Activity 11 Stats
Determine whether each of the following is a null of an
alternative hypothesis:
The average income of an employee is 12,000 pesos.
Answer:
null hypothesis
Correct
Feedback
The correct answer is: Null hypothesis
The level of significance is the
Select one:
a. 1 - p value
b. Same as confidence interval
c. Maximum allowable probability of Type II error
d. Minimum allowable probability of Type II error
e. Probability of committing a Type I error Correct
Feedback
The correct answer is: Probability of committing a Type I
error
What is the null hypothesis to the claim that people like
android phone than IOS? State the null hypothesis.
Select one:
a. Less people like IOS than android
b. More people like android than IOS phone Correct
c. Less people like android and IOS phone
d. More people like IOS phone than android phone
Feedback
The correct answer is: More people like android than IOS
phone
If the null hypothesis is true and rejected, the decision is
incorrect – Type I Error
Select one:
a. Rejection Error
b. Type I Error Correct
c. Correction Error
d. Type II Error
Feedback
The correct answer is: Type I Error
Determine whether each of the following is a null of an
alternative hypothesis:
The average internet usage of a College student is 6 hours.
Answer:
null hypothesis
Correct
Feedback
The correct answer is: Null hypothesis
Short quiz 14
In a ____________, high values in one variable correspond to
high values in the other variable.
Select one:
a. Perfect Correlation Incorrect
b. Positive Correlation
c. Scattered Correlation
d. Negative Correlation
Feedback
The correct answer is: Positive Correlation
Graphical representation of the relationship between two
variables.
Select one:
a. Line Plots Incorrect
b. XY intersection plot
c. scatter plot
d. Cartesian plane
Feedback
The correct answer is: scatter plot
When examining scatterplot and draw an ellipse around the
data, long and narrow ellipses means
Select one:
a. Negative linear association
b. Weak linear association
c. Positive linear association Incorrect
d. Strong linear association
e. Cannot determine with the given information
Feedback
The correct answer is: Strong linear association
This measures relationship between bivariate data.
Select one:
a. None of the choices
b. Correlation Correct
c. All of the choices
d. Linear Regression
e. Scatterplot Analysis
Feedback
The correct answer is: Correlation
A _____________ is simply a scatterplot in which we connect
successive chronological observations with a line segment to give more
information about how the data values are changing over a period of time.
Select one:
a. XY Plot
b. Scatter Plot
c. Correlation Plot
d. Line plot Correct
Feedback
The correct answer is: Line plot
The data had a _________________ when one variable increases,
the other variable also decreases.
Select one:
a. negative linear association Incorrect
b. proportional association
c. elliptical association
d. positive linear association
Feedback
The correct answer is: positive linear association
The goal of examining bivariate data is to show some
relativity or association between two or more variables.
Select one:
a. The statement is TRUE. Incorrect
b. The statement is FALSE.
Feedback
The correct answer is: The statement is FALSE.
Learning Actvity 14 Stats
Given the data below, what is the direction of the
association between the two variables.
Select one:
a. Positive linear association Incorrect
b. Weak linear association
c. Strong linear association
d. None of the choices
e. Negative linear association
Feedback
The correct answer is: Negative linear association
The data had a _________________ when one variable
increases, the other variable also increases.
Select one:
a. positive linear association Correct
b. proportional association
c. elliptical association
d. negative linear association
Feedback
The correct answer is: positive linear association
The line that is closest to the points is called
_____________.
Select one:
a. Trend line Correct
b. Correlation line
c. Cross line
d. Scatter line
Feedback
The correct answer is: Trend line
The three important characteristics of a bivariate?
Select one:
a. Elliptical, Rounded, Scattered
b. Proportional, Directional, Elliptical
c. Direction, Shape, Strength
d. Line, Points, Shape Incorrect
Feedback
The correct answer is: Direction, Shape, Strength
The series of disconnected points is referred to as
_________________________
Select one:
a. XY Plots
b. Trend line plots
c. Bivariate data
d. scatter plot Correct
Feedback
The correct answer is: scatter plot
Short Quiz 16 Stats
The equation y=2x2 + 9 will produce a
Select one:
a. Parabola Correct
b. Ellipse
c. Circle
d. Straight line
Feedback
The correct answer is: Parabola
When slope is positive,
Select one:
a. y increases as x increases Correct
b. y decreases as x increases
c. y increases, x values approaches point of origin
d. y decreases, x values approaches 1
Feedback
The correct answer is: y increases as x increases
In the slope-intercept equation of a line, the slope of the
line is represented as the coefficient of the variable x.
Select one:
a. FALSE
b. Cannot be determined
c. TRUE Correct
Feedback
The correct answer is: TRUE
Given the table below, what is the linear equation?
Select one:
a. y=3x + 11 Incorrect
b. y=6x + 5
c. y=8x + 3
d. y=3x + 8
Feedback
Your answer is incorrect.
The correct answer is: y=8x + 3
If the line has no slope,
Select one:
a. The line is a horizontal line
b. The line is at the point of origin
c. The line intercepts the x and y axis
d. The line lies at the x axis Incorrect
Feedback
The correct answer is: The line is a horizontal line
Given the table below, what is the slope?
Select one:
a. 9
b. 11
c. 8
d. 3 Incorrect
Feedback
Your answer is incorrect.
The correct answer is: 8
Given the equation y = 7x+ 30, what is the slope?
Answer:
4.2
Incorrect
Feedback
The correct answer is: 7
Given the table and graph, determine the slope intercept
equation.
Select one:
a. y=5x + 1
b. y=10x + 2 Incorrect
c. y=5x + 2
d. y=10x + 1
Feedback
Your answer is incorrect.
The correct answer is: y=5x + 1
Given the equation 9y = 2x + 81, what is the y intercept?
Answer:
Incorrect
Feedback
The correct answer is: 9
The equation y=mx + b is also known as
Select one:
a. slope intercept form
b. y intercept Incorrect
c. correlation intercept form
d. xy intercept form
Feedback
The correct answer is: slope intercept form
Learning Activity 16 Stats
Given the equation y = 3x+ 10, what is the slope?
Answer:
3
Correct
Feedback
The correct answer is: 3
Given the table and graph, determine the slope intercept
equation.
Select one:
a. y=3x + 1
b. 2y=6x + 3
c. y=-3x + 3 Correct
d. 2y=6x + 1
The correct answer is: y=-3x + 3
Given the table below, what is the slope?
Select one:
a. 2 Correct
b. 1
c. 8
d. 7
Feedback
Your answer is correct.
The correct answer is: 2
Given the equation 2y = 3x + 10, what is the y intercept?
Answer:
2
Incorrect
Feedback
The correct answer is: 5
Given the table below, what is the linear equation?
Select one:
a. y=2x + 7 Correct
b. y=5x + 2
c. y=7x + 1
d. y=7x + 5
Feedback
Your answer is correct.
The correct answer is: y=2x + 7
Write the
slope-intercept equation of the line that has slope 6 and y-intercept 4.
answer: 6x+4
Q: True or False: The Greek letter alpha represents the
mean.
A: False
Q: This determines the degree to which values of a random
variable dif
A: Variance
Q: Find the median of the following data set. 11, 13, 15,
17, 19, 21, 22, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 51, 53, 55, 57, 59
A: 31
Q: A single value given as an estimate of a parameter of a
population.
A: Sample Mean
Q: Empirical Rule states that 68% of the data falls within
the 1 standard deviation.
A: False
Q: The sum of all the probabilities P(X = x) for all
possible values of a discrete random variable X must equal 1.
A: The statement is TRUE.
True or False: Variance is the degree to which values of a
random variable differ from the expected value
ANSWER: TRUE
Q: As the sample size increases,
A: sampling distribution becomes closer to a normal
distribution.
Q: Given the following sample data, compute for the true
mean. The answer must have two decimal places.1 1 1 2 3 4 5 5 5 8 8 8 8
A: 4.53
Q: How many possible outcomes when you simultaneously toss
three fair coins.
A: 8
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Weight of students in a university
A: CONTINUOUS
Q: True or False: In Statistics, variance is defined as the
number of times an outcome can occur compared to all possible outcomes.
A: False
Q: True or False: Mean is the sum of all possible values of
random variables.
A: False
Q: Find the median of the following data set. 44, 46, 29,
39, 59, 59, 39
A: 39
Q: Which of the following does not describes a T
distribution?
A: Mean of Means is equal to 0
Q: True or False: Random sample happened when data is
collected in no certain order
A: True
Q: True or False: In order to apply the Central Limit
Theorem, a sample size must be greater than or equal to 20.
A: False
Q: To calculate the mean from a sample,
A: Add all the values and divided by the total number of
samples
Q: Which of the following is used to calculate population
parameter?
A: Point Estimate
Q: Identify whether each example describes a random sample.
Answer with Yes or No The manager chooses 30 employees randomly from a
department.
A: Yes
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Total number of volunteers in a community
A: DISCRETE
Q: Normal Distribution Curve is also called
A: Bell Curve
Q: In Central Limit Theorem, the mean of the sampling
distribution of the mean is equal to the
A: Population mean
Q: Which measure of tendency is the best estimator?
A: Mean
Q: The number of times out of 100 that the repeated
experiment would be expected to capture the population mean within the given
interval.
A: Confidence Level
Q: In a normal curve, a ___ of 1 means 1 deviation data are
above the average.
A: Z score
Q: True or False: In Central Limit Theorem, the mean of the
sampling distribution of the mean is equal to the population mean.
A: True
Q: Confidence coefficient is a single value given as an
estimate of a parameter of a population.
A: FALSE. Change “confidence coefficient” to sample mean
Q: For example, a 90% confidence interval covers 90% of the
normal curve, so the probability of observing a value outside of this area is
____________.
A: Less than 10%
Q: Use to check the normality of a distribution
A: Normal quantile plot
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Number of winning tournaments of a varsity team
A: DISCRETE
Q: The weighted average of the possible values of random
variables.
A: Mean
Q: Identify whether each example describes a random sample.
Answer with Yes or No. Collects the number of students who rides on the train.
A: Yes
Q: Consider the given the probability distribution
A: 4.100
Q: PROBLEM SOLVING: Write the answer corresponds to the
problem.
REMINDERS If the answer requires decimals, express your
answer in 2 decimal places. If your answer is more than 3 digits, DO NOT
INCLUDE THE COMMA.
If there are three students that are randomly selected from
population of 20 for each sample, how many possible samples will there be?
A: 1140
Q: Which of the following describes a Normal Distribution
Curve.
A: All of the choices
Q: True or False: Random distribution is the process of
assigning a number to each member of the population
A: False
Q: How many regions can be found at the left side of the
normal distribution curve?
A: 3
Q: Normal Distribution Curve is also called
A: Bell Curve
Q: Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, how many numbers are in the
lower quartile?
A: 4
Q: In order to apply the Central Limit Theorem, a sample
size must be greater than or equal to _______.
A: 30
Q: Who is the famous mathematician where the normal
distribution curve was named after?
A: Carl Friedrich Gauss
Population Mean is an example of a parameter.
A: true
Q: True or False: People whose names were drawn out of the
survey is an example of a random sample
A: True
Q: Empirical Rule states that _____ % of data falls within
the first standard deviation from the mean.
A: 68
Q: The sum of all the probabilities P(X = x) for all
possible values of a discrete random variable X must equal to
A: 1
Q: True or False: The number of questions that you answer
correctly on this quiz is an example of a discrete random variable.
A: False
Q: Identify whether each example describes a random sample.
Answer with Yes or No. A teacher conducts examination to all his students.
A: No
Q: Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, find the upper quartile
A: 14
Q: What is the formula to calculate for the z-score?
A: Mean value of the variable subtracted from the observed
value divided by the standard deviation
Q: Given the following table, what is the correct
computation to find mean?
x,0,1,2
p(x),0.30,0.20,0.10
A: None of the choices
Q: True or False: As the sample size increases, the standard
error increases.
A: False
It is the number of times an outcome can occur compared to
all possible outcomes.
Select one:
a. Variance
b. Standard Deviation
c. Mean
d. Probability
What is the common symbol for the mean?
Select one:
a. ∑
b. Α
c. Ω
d. µ
True or False: Mean is computed as the weighted average of
the possible numbers of random variables. ANSWER: TRUE
Assuming z-score is 1, which of the following statement is
TRUE.
Select one:
a. All values are less than the mean.
b. All values are
equal to the z-score
c. All values are
equal to the mean.
d. All values are
greater than the mean.
True or False: To determine the value of the mean, multiply
each possible outcome of the random variables X by its associated probability
and the take the sum over all possible values of X.
Answer: true
How do you determine the value of the mean,
Select one:
a. Multiply each
possible outcome of the random variables X by its associated probability and
the take the square root of the sum of all possible values of X.
b. None of the
choices
c. Sum each possible
outcome of the random variables X by its associated probability and the take
the product of all possible values of X.
d. Multiply each
possible outcome of the random variables X by its associated probability and
the take the sum over all possible values of X.
True or False: The probability variance of a discrete random
variable is a graph, a table or a formula that specifies the probability
associated with each possible value that the random variable can assume.
Answer: FALSE
true or False: One of the most important characteristics of
any probability distribution is the mean.
~ true
The probability distribution of a discrete random variable
is a graph, a table or a formula that specifies the probability associated with
each possible value that the random variable can assume.
Select one:
a. The statement is
INCORRECT. The word “formula” should not be included in the statement.
b. The statement is
INCORRECT. The word “graph” should not be included in the statement.
c. The statement is
INCORRECT. The word “graph and formula” should not be included in the statement.
d. The statement is
ALWAYS CORRECT.
Which of the following applies to a normal distribution?
Select one:
a. Mean is greater
than Median.
b. Data is exactly
equal to the mean.
c. Exactly ½ of the
data is above the mean and ½ of data is below.
d. Median is greater
than Mean.
e. None of the
choices
What are the percentages of normal distribution within 1, 2
and 3 standard deviation.
Select one:
a. Approximately 50%
and 50% respectively
b. Exactly 25%, 25%
and 50% respectively
c. Exactly 100% be
applied to each standard deviation
d. Approximately 68%,
95% and 99.7% respectively
In order to apply the Central Limit Theorem, a sample size
________________________.
Select one:
a. Must be greater
than zero.
b. Must be greater
than sample distribution.
c. Must be equal than
the sample mean.
d. Must be greater
than 30.
This is a representative subset of a population.
Select one:
a. Standard Deviation
b. Sample
c. Statistics
d. Mean
In the Empirical Rule, _______ % of data will fall in with
two standard deviation.
Select one:
a. 99.7
b. 34
c. 50
d. 100
e. 95
This is always in the center of the normal curve
Select one:
a. Mode
b. Median
c. Standard Deviation
d. Mean
True or False: Variance is the degree to which values of a
random variable differ from the expected value.
A: false
In a normal curve, the mean is located at the
Select one:
a. highest point of
the curve
b. lowest point of
the curve
c. midpoint of the
curve
d. intersection of
the lowest and highest point
The range of probability is
Select one:
a. can be any number
(positive or negative)
b. from zero to 1
c. negative 1 to
positive 1
d. from zero to any
positive number
The standard deviation of the normal distribution is
Select one:
a. should always be a
positive number
b. always equal to
zero
c. always equal to
one
d. greater than or
equal to zero
This determines the degree to which values of a random
variable differ from the expected value.
Select one:
a. Median
b. Standard Deviation
c. Variance
d. Mode
e. Mean
The mean of the normal distribution is
Select one:
a. should always be a
positive number
b. always equal to
zero
c. always equal to
one
d. greater than or
equal to zero
This are numbers that summarizes data for an entire
population
Select one:
a. Standard Deviation
b. Mean
c. Sample
Distribution of sample means
d. Standard deviation
of the distribution of the sample means
e. Sample
f. Parameter
g. Random Sample
h. Standard Curve
i. Sampling Error
j. Population
k. Population Mean
l. Distribution Error
m. Median
n. Mode
o. Statistics
p. Sample
q. Deviation Error
True or False: The probability of an outcome that all heads
face up when fairly tossing three coin is 3/8.
Answer: false
The range of possible values expected to capture the
population mean.
Select one:
a. Standard Deviation
Error
b. Confidence
Interval
c. Margin of Error
d. Confidence Level
The t-distribution shape changes as the _______________
changes.
Select one:
a. Population Mean
b. None of the
choices
c. Sample Mean
d. Sample size
The confidence level is expressed in terms of ____________.
Select one:
a. Percentage
b. Whole Number
c. Fraction
d. Ratio
In Central Limit Theorem, the standard deviation of the
population is estimated by dividing the standard deviation of the population by
the square of the sample size.
Select one:
a. The statement is
TRUE
b. The statement is
FALSE
c. The statement is
SOMETIMES FALSE
d. The statement is
SOMETIMES TRUE
Q: True or False: The Greek letter alpha represents the
mean.
A: False
Q: This determines the degree to which values of a random
variable dif
A: Variance
Q: Find the median of the following data set. 11, 13, 15,
17, 19, 21, 22, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 51, 53, 55, 57, 59
A: 31
Q: A single value given as an estimate of a parameter of a
population.
A: Sample Mean
Q: Empirical Rule states that 68% of the data falls within
the 1 standard deviation.
A: False
Q: The sum of all the probabilities P(X = x) for all
possible values of a discrete random variable X must equal 1.
A: The statement is TRUE.
Q: As the sample size increases,
A: sampling distribution becomes closer to a normal
distribution.
Q: Given the following sample data, compute for the true
mean. The answer must have two decimal places.1 1 1 2 3 4 5 5 5 8 8 8 8
A: 4.53
Q: How many possible outcomes when you simultaneously toss
three fair coins.
A: 8
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Weight of students in a university
A: CONTINUOUS
Q: True or False: In Statistics, variance is defined as the
number of times an outcome can occur compared to all possible outcomes.
A: False
Q: True or False: Mean is the sum of all possible values of
random variables.
A: False
Q: Find the median of the following data set. 44, 46, 29,
39, 59, 59, 39
A: 39
Q: Which of the following does not describes a T
distribution?
A: Mean of Means is equal to 0
Q: True or False: Random sample happened when data is
collected in no certain order
A: True
Q: True or False: In order to apply the Central Limit
Theorem, a sample size must be greater than or equal to 20.
A: False
Q: To calculate the mean from a sample,
A: Add all the values and divided by the total number of
samples
Q: Which of the following is used to calculate population
parameter?
A: Point Estimate
Q: Identify whether each example describes a random sample.
Answer with Yes or No The manager chooses 30 employees randomly from a
department.
A: Yes
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Total number of volunteers in a community
A: DISCRETE
Q: Normal Distribution Curve is also called
A: Normal Curve
Q: In Central Limit Theorem, the mean of the sampling
distribution of the mean is equal to the
A: Population mean
Q: Which measure of tendency is the best estimator?
A: Mean
Q: The number of times out of 100 that the repeated
experiment would be expected to capture the population mean within the given
interval.
A: Confidence Level
Q: In a normal curve, a ___ of 1 means 1 deviation data are
above the average.
A: Z score
Q: True or False: In Central Limit Theorem, the mean of the
sampling distribution of the mean is equal to the population mean.
A: True
Q: Confidence coefficient is a single value given as an
estimate of a parameter of a population.
A: FALSE. Change “confidence coefficient” to sample mean
Q: For example, a 90% confidence interval covers 90% of the
normal curve, so the probability of observing a value outside of this area is
____________.
A: Less than 10%
Q: Use to check the normality of a distribution
A: Normal quantile plot
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Number of winning tournaments of a varsity team
A: DISCRETE
Q: The weighted average of the possible values of random
variables.
A: Mean
Q: Identify whether each example describes a random sample.
Answer with Yes or No. Collects the number of students who rides on the train.
A: Yes
Q: Consider the given the probability distribution
A:
Q: PROBLEM SOLVING: Write the answer corresponds to the
problem.
REMINDERS If the answer requires decimals, express your
answer in 2 decimal places. If your answer is more than 3 digits, DO NOT
INCLUDE THE COMMA.
If there are three students that are randomly selected from
population of 20 for each sample, how many possible samples will there be?
A: 1140
Q: Which of the following describes a Normal Distribution
Curve.
A: All of the choices
Q: True or False: Random distribution is the process of
assigning a number to each member of the population
A: False
Q: How many regions can be found at the left side of the
normal distribution curve?
A: 3
Q: Normal Distribution Curve is also called
A: Basic Curve
Q: Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, how many numbers are in the lower
quartile?
A: 4
Q: In order to apply the Central Limit Theorem, a sample
size must be greater than or equal to _______.
A: 30
Q: Who is the famous mathematician where the normal
distribution curve was named after?
A: Carl Friedrich Gauss
Q: True or False: People whose names were drawn out of the
survey is an example of a random sample
A: True
Q: Empirical Rule states that _____ % of data falls within
the first standard deviation from the mean.
A: 68
Q: The sum of all the probabilities P(X = x) for all possible
values of a discrete random variable X must equal to
A: 1
Q: True or False: The number of questions that you answer
correctly on this quiz is an example of a discrete random variable.
A: False
Q: Identify whether each example describes a random sample.
Answer with Yes or No. A teacher conducts examination to all his students.
A: No
Q: Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, find the upper quartile
A: 14
Q: What is the formula to calculate for the z-score?
A: Mean value of the variable subtracted from the observed
value divided by the standard deviation
Q: Given the following table, what is the correct
computation to find mean?
x,0,1,2
p(x),0.30,0.20,0.10
A: None of the choices
Q: True or False: As the sample size increases, the standard
error increases.
A: False
STAT-112-20172S / ►
Week 10: Quarterly Exam / ►
Quarterly Exam
Q: True or False: The Greek letter alpha represents the
mean.
A: False
Q: This determines the degree to which values of a random
variable dif
A: Variance
Q: Find the median of the following data set. 11, 13, 15,
17, 19, 21, 22, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 51, 53, 55, 57, 59
A: 31
Q: A single value given as an estimate of a parameter of a
population.
A: Sample Mean
Q: Empirical Rule states that 68% of the data falls within
the 1 standard deviation.
A: False
Q: The sum of all the probabilities P(X = x) for all
possible values of a discrete random variable X must equal 1.
A: The statement is TRUE.
Q: As the sample size increases,
A: sampling distribution becomes closer to a normal
distribution.
Q: Given the following sample data, compute for the true
mean. The answer must have two decimal places.1 1 1 2 3 4 5 5 5 8 8 8 8
A: 4.53
Q: How many possible outcomes when you simultaneously toss
three fair coins.
A: 8
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Weight of students in a university
A: CONTINUOUS
Q: True or False: In Statistics, variance is defined as the
number of times an outcome can occur compared to all possible outcomes.
A: False
Q: True or False: Mean is the sum of all possible values of
random variables.
A: False
Q: Find the median of the following data set. 44, 46, 29,
39, 59, 59, 39
A: 39
Q: Which of the following does not describes a T
distribution?
A: Mean of Means is equal to 0
Q: True or False: Random sample happened when data is
collected in no certain order
A: True
Q: True or False: In order to apply the Central Limit
Theorem, a sample size must be greater than or equal to 20.
A: False
Q: To calculate the mean from a sample,
A: Add all the values and divided by the total number of
samples
Q: Which of the following is used to calculate population
parameter?
A: Point Estimate
Q: Identify whether each example describes a random sample.
Answer with Yes or No The manager chooses 30 employees randomly from a
department.
A: Yes
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Total number of volunteers in a community
A: DISCRETE
Q: Normal Distribution Curve is also called
A: Normal Curve
Q: In Central Limit Theorem, the mean of the sampling
distribution of the mean is equal to the
A: Population mean
Q: Which measure of tendency is the best estimator?
A: Mean
Q: The number of times out of 100 that the repeated
experiment would be expected to capture the population mean within the given
interval.
A: Confidence Level
Q: In a normal curve, a _ of 1 means 1 deviation data are
above the average.
A: Z score
Q: True or False: In Central Limit Theorem, the mean of the
sampling distribution of the mean is equal to the population mean.
A: True
Q: Confidence coefficient is a single value given as an
estimate of a parameter of a population.
A: FALSE. Change “confidence coefficient” to sample mean
Q: For example, a 90% confidence interval covers 90% of the
normal curve, so the probability of observing a value outside of this area is
__________.
A: Less than 10%
Q: Use to check the normality of a distribution
A: Normal quantile plot
Q: Identify if the random variable is a DISCRETE or
CONTINUOUS. Number of winning tournaments of a varsity team
A: DISCRETE
Q: The weighted average of the possible values of random
variables.
A: Mean
Q: Identify whether each example describes a random sample.
Answer with Yes or No. Collects the number of students who rides on the train.
A: Yes
Q: Consider the given the probability distribution
A:
Q: PROBLEM SOLVING: Write the answer corresponds to the
problem.
REMINDERS If the answer requires decimals, express your
answer in 2 decimal places. If your answer is more than 3 digits, DO NOT
INCLUDE THE COMMA.
If there are three students that are randomly selected from
population of 20 for each sample, how many possible samples will there be?
A: 1140
Q: Which of the following describes a Normal Distribution
Curve.
A: All of the choices
Q: True or False: Random distribution is the process of
assigning a number to each member of the population
A: False
Q: How many regions can be found at the left side of the
normal distribution curve?
A: 3
Q: Normal Distribution Curve is also called
A: Basic Curve
Q: Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, how many numbers are in the
lower quartile?
A: 4
Q: In order to apply the Central Limit Theorem, a sample
size must be greater than or equal to _____.
A: 30
Q: Who is the famous mathematician where the normal
distribution curve was named after?
A: Carl Friedrich Gauss
Q: True or False: People whose names were drawn out of the
survey is an example of a random sample
A: True
Q: Empirical Rule states that ___ % of data falls within the
first standard deviation from the mean.
A: 68
Q: The sum of all the probabilities P(X = x) for all
possible values of a discrete random variable X must equal to
A: 1
Q: True or False: The number of questions that you answer
correctly on this quiz is an example of a discrete random variable.
A: False
Q: Identify whether each example describes a random sample.
Answer with Yes or No. A teacher conducts examination to all his students.
A: No
Q: Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, find the upper quartile
A: 14
Q: What is the formula to calculate for the z-score?
A: Mean value of the variable subtracted from the observed
value divided by the standard deviation
Q: Given the following table, what is the correct
computation to find mean?
x,0,1,2
p(x),0.30,0.20,0.10
A: None of the choices
Q: True or False: As the sample size increases, the standard
error increases.
A: False
Which of the following is tells about t distribution,
A: all of the choices
Two dice is rolled and the sum of face up is being recorded
and represented as X. What is P(x <=
5)? 10
In a normal distribution curve,: Mean is equal to Median;
None of the choices; Mean is equal to Mode; Mean is equal to Median and
Mode Mean is equal to
Median and Mode
True or False: Sampling Error is the degree of error
expected for a given sample design TRUE
Identify whether each example describes a random sample.
Answer with Yes or No A survey company collects information on businessman in
Metro Manila on who will they vote for president on the next election. Yes
1. Given the data
set, find the Mean Value or Expected value (round off your answer to the
nearest tenths):
4.2
Identify if the random variable is a DISCRETE or CONTINUOUS.
The brightness of an LED bulb
CONTINUOUS
In a normal distribution curve, data are divided into 3
equal parts.: The statement is FALSE.; None of the choices; The statement is
TRUE.; The statement is SOMETIMES TRUE depending on the data set.
None of the choices
True or False: The probability of an outcome that all heads
face up when fairly tossing three coin is 3/8.
False
True or False: Variance is the degree to which values of a
random variable differ from the expected value. False
Given the following mean, compute for the Mean of Means. The
answer must have two decimal places. 4.5, 9.2, 9.1, 8.4 2.60
True or False: To determine the value of the mean, multiply
each possible outcome of the random variables X by its associated probability
and the take the sum over all possible values of X. True
Identify whether each example describes a random sample.
Answer with Yes or No. Collects the number of students who rides on the
train. Yes
True or False: The probability variance of a discrete random
variable is a graph, a table or a formula that specifies the probability
associated with each possible value that the random variable can assume. False
True or False: Mean is the sum of all possible values of
random variables.
False
Identify whether each example describes a random sample.
Answer with Yes or No Women who volunteer to take a survey on human
rights. No
The speed of cars travelling in the road and the water
consumption of household are examples of: Continuous Discrete Random Variable;
None of the choices; Discrete Random Variables; Discrete Continuous Random
Variable; Continuous Random Variable
Continuous Random Variable
Identify if the random variable is a DISCRETE or CONTINUOUS.
Time travelled by an astronaut
CONTINUOUS
This determines the degree to which values of a random
variable differ from the expected value.: Mean; Median; Standard Deviation;
Variance; Mode
Variance
It is a part of population intended to represent a
population as a whole.: Sample; Mode; Random Sample; Standard Curve; Standard
deviation of the distribution of the sample means; Statistics; Sampling Error;
Standard Deviation; Population; Distribution Error; Population Mean; Mean;
Sample; Median; Sample Distribution of sample means; Deviation Error;
Parameter Sample
True or False: Parameters are numbers that summarizes data
for an entire population TRUE
1. Given the data
set, find the Mean Value or Expected value (round off your answer to the
nearest tenths):
4.2
The probability distribution of a discrete random variable
is a graph, a table or a formula that specifies the probability associated with
each possible value that the random variable can assume.: The statement is
INCORRECT. The word “graph and formula” should not be included in the
statement.; The statement is INCORRECT. The word “graph” should not be included
in the statement.; The statement is INCORRECT. The word “formula” should not be
included in the statement.; The statement is ALWAYS CORRECT. The statement is ALWAYS
CORRECT.
It is a part of population intended to represent a
population as a whole.: Standard deviation of the distribution of the sample
means; Deviation Error; Standard Deviation; Sampling Error; Mean; Parameter;
Random Sample; Mode; Statistics; Standard Curve; Sample; Sample Distribution of
sample means; Population; Median; Sample; Population Mean; Distribution
Error Sample
The standard deviation of the normal distribution is: always
equal to zero; greater than or equal to zero; always equal to one; should
always be a positive number
always equal to one
It is the measure of how many standard deviations below or
above the population mean.: Z-score; Normal Distribution Measurement; Median;
Empirical Rule Z-score
In a normal distribution curve,: Mean is equal to Median and
Mode; Mean is equal to Median; Mean is equal to Mode; None of the choices Mean is equal to Median and Mode
In a normal distribution curve, data are divided into 3
equal parts.: The statement is TRUE.; The statement is FALSE.; None of the
choices; The statement is SOMETIMES TRUE depending on the data set. None of the choices
Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, how many numbers are in the
lower quartile?: 6; 1; 4; 0 4
Given the following table, what is the correct computation
to find mean? : (0.30+0.20+0.10)/3; None of the choices ;
(0.30+0.20+0.10)/(0+1+2) ; (0)(0.30) + (1)(0.20) + (2)(0.10);
(0+1+2)(0.30+0.20+0.10) None of
the choices
True or False: Random sample happened when data is collected
in no certain order TRUE
Identify whether each example describes a random sample.
Answer with Yes or No Renmel closes his eyes, opens a book and randomly points
to a word on the page. She repeats the
process for 30 times. No
True or False: Random distribution is the process of
assigning a number to each member of the population FALSE
Identify whether each example describes a random sample.
Answer with Yes or No. The speed of internet in all areas in the Visayas
Region. Yes
True or False: To determine the value of the mean, multiply
each possible outcome of the random variables X by its associated probability
and the take the sum over all possible values of X. True
True or False: Standard deviation of the distribution of the
sample means is computed as the population standard deviation multiplied by the
square root of the sample size.
FALSE
What is the probability distribution of occurring the all
heads in a toss of three coins?: 0.25; 0.1255; 0; None of the choices; 1 0.1255
Given the following mean, compute for the Mean of Means. The
answer should be rounded off to the nearest hundredths. 3.2 3.6 3.9 9.2
True or False: The probability variance of a discrete random
variable is a graph, a table or a formula that specifies the probability
associated with each possible value that the random variable can assume. False
True or False: Sample Distribution of sample means is the
the distribution that describes the spread of the means of multiple samples
from the sample population TRUE
Identify whether each example describes a random sample.
Answer with Yes or No. Collects the election results in all areas in the
Philippines during election No
Which of the following random activity would you define as a
discrete random variable?: Depth of building excavation.; Height of students
enrolled in an online course.; None of the choices.; Wind speed during
typhoon.; Distance travelled of a tourist bus. None of the choices.
What is the common symbol for the mean?: Α; ∑; µ; Ω µ
What is the probability distribution of occurring the all
heads in a toss of three coins?: 0.25; 0; None of the choices; 0.1255; 1 0.1255
Given
the following sample data, compute for the true mean. The answer should be
rounded off to one decimal place. 3 5 5 5 6 6 8 8 13 15 17 30 10.8
How do you determine the value of the mean,: Sum each
possible outcome of the random variables X by its associated probability and
the take the product of all possible values of X.; None of the choices;
Multiply each possible outcome of the random variables X by its associated
probability and the take the sum over all possible values of X.; Multiply each
possible outcome of the random variables X by its associated probability and
the take the square root of the sum of all possible values of X. Multiply each
possible outcome of the random variables X by its associated probability and
the take the sum over all possible values of X.
This are numbers that summarizes data from a sample: Parameter;
Sampling Error; Statistics; Sample Distribution of sample means; Standard
Deviation; Population Mean; Mode; Standard Curve; Sample; Population; Median;
Distribution Error; Deviation Error; Standard deviation of the distribution of
the sample means; Random Sample; Mean; Sample Statistics
Which of the following is not a characteristics of a normal
distribution.: None of the choices; Perfectly asymmetric; Mount-shaped
distribution; Bell-shaped Perfectly asymmetric
It is the measure of how many standard deviations below or
above the population mean.: Median; Normal Distribution Measurement; Empirical
Rule; Z-score Z-score
Salary, scores and age are examples of ____________ random
variables. Continuous
Identify whether each example describes a random sample. Answer with Yes
or No A survey company collects information on businessman in Metro Manila on
who will they vote for president on the next election. Yes
Identify if the random variable is a DISCRETE or CONTINUOUS.
Total number of volunteers in a community DISCRETE
In a normal curve, the bigger the values of standard
deviation results to a: wider curve; straight live curve; skewed to the right;
narrower curve; skewed to the left wider curve
Which of the following is CORRECT about Sample Space: Sample
space should be always be a number from zero to one.; Sample space are possible
outcomes; Sample space is a subset of events.; Sample space is also known as
probability mass function.
Sample space are possible outcomes
Assuming z-score is -1, which of the following statement is
TRUE.: All values are less than the mean.; All values are equal to the z-score;
All values are equal to the mean.; All values are greater than the mean. All values are less than the mean.
It is the measure of how many standard deviations below or
above the population mean.: Normal Distribution Measurement; Z-score; Empirical
Rule; Median Z-score
Which of the following statement is TRUE.: Non-countable
values are called discrete variables; Infinite numbers are considered discrete
variables.; Countable number of values are called discrete variables; All of
the statements are TRUE. Countable
number of values are called discrete variables
True or False: Parameters are numbers that summarizes data
for an entire population TRUE
True or False: Sample Distribution of sample means is the
the distribution that describes the spread of the means of multiple samples
from the sample population TRUE
Identify if the random variable is a DISCRETE or CONTINUOUS.
Number of winning tournaments of a varsity team DISCRETE
The probability distribution of a discrete random variable
is a graph, a table or a formula that specifies the probability associated with
each possible value that the random variable can assume.: The statement is
INCORRECT. The word “graph and formula” should not be included in the statement.;
The statement is INCORRECT. The word “graph” should not be included in the
statement.; The statement is INCORRECT. The word “formula” should not be
included in the statement.; The statement is ALWAYS CORRECT. The statement is ALWAYS
CORRECT.
The range of probability is: can be any number (positive or
negative); negative 1 to positive 1; from zero to any positive number; from
zero to 1 from zero to 1
Which of the following is incorrect?: Probability
distribution is used to compute discrete random variables; Probability
distribution equals to zero.; Probability distribution is used to compute
continuous random variables; Probability distribution equals to one.; None of
the choices Probability distribution equals to zero.
Assuming z-score is -1, which of the following statement is
TRUE.: All values are equal to the mean.; All values are equal to the z-score;
All values are less than the mean.; All values are greater than the mean. All values are less than the mean.
Normal Distribution Curve is also called: Basic Curve;
Arc-Shaped Curve; Bell Curve; All of the choices Basic Curve
Identify whether each example describes a random sample.
Answer with Yes or No. A teacher conducts examination to all his students. No
Identify if the random variable is a DISCRETE or CONTINUOUS.
Internet speed in an office
CONTINUOUS
Given the following mean, compute for the Mean of Means. The
answer should be rounded off to the nearest hundredths. 3.2 3.6 3.9 9.2 1.65
True or False: The larger the sample size the closer the
sampling distribution was to a normal distribution TRUE
Given the set of data:
1, 1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the lower quartile : 8; 0;
3,4,5,6,7,8,9,10,11,12,; 3 8
Identify if the random variable is a DISCRETE or CONTINUOUS.
Number of students in a University
DISCRETE
In a given experiment, the sum of all probabilities is: can
be any number (positive or negative); One; Zero; All positive numbers One
This is states that the percentages of data in a normal
distribution within 1,2 and 3 standard deviations.: Empirical Rule; None of the
choices; Normal quantile plot; Z score Empirical Rule
Salary, scores and age are examples of ____________ random
variables. Continuous
Two dice is rolled and the sum of face up is being recorded
and represented as X. What is P(x <=
5)? 10
A fair six sided dice is tossed. The player loses 5 pesos if
the result is “1”, and loses P5 pesos if the result is a “6”, the rest of the
numbers, player wins P10. Which of the following table best describes the problem?
: ; None of the choices; ;
The sum of all the probabilities P(X = x) for all possible
values of a discrete random variable X must equal to ______. 1
Given the set of data:
1,1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the upper quartile : 18;
13,14,15,14,15,16,17,18,19,20,21,22; 22; 0 18
The data set that approximates a normal distribution is
located at the left side of the curve wherein mean is greater than median.:
None of the choices.; The statement is INCORRECT; The statement is ALWAYS
TRUE.; The statement is SOMETIMES TRUE.
The statement is INCORRECT
Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, how many numbers are in the
lower quartile?: 0; 4; 6; 1 4
Identify whether each example describes a random sample.
Answer with Yes or No Selects all areas in the Philippines who are affected by
typhoon and with 5th and 6th income class. Yes
Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, how many numbers are in the
lower quartile?: 1; 4; 6; 0 4
It is computed as the population standard deviation divided
by the square root of the sample size: Random Sample; Standard Deviation;
Median; Parameter; Standard deviation of the distribution of the sample means;
Deviation Error; Sample; Mean; Population Mean; Sample Distribution of sample
means; Sampling Error; Sample; Statistics; Mode; Standard Curve; Distribution
Error; Population
Standard deviation of the distribution of the sample means
Identify whether each example describes a random sample.
Answer with Yes or No. The speed of internet in all areas in the Visayas
Region. Yes
This are numbers that summarizes data for an entire
population: Mean; Random Sample; Mode; Standard deviation of the distribution
of the sample means; Deviation Error; Parameter; Standard Curve; Statistics;
Population; Population Mean; Sample; Median; Sampling Error; Sample
Distribution of sample means; Standard Deviation; Distribution Error;
Sample Parameter
True or False: The Greek letter alpha represents the
mean. False
It is measure of the number of standard deviations a
particular data value: Z score; Normal quantile plot; None of the choices;
Empirical Rule Z score
True or False: In Statistics, variance is defined as the
number of times an outcome can occur compared to all possible outcomes. False
Normal Distribution Curve is also called: Normal Curve;
Arc-Shaped Curve; All of the choices; Basic Curve Normal Curve
Identify if the random variable is a DISCRETE or CONTINUOUS.
Mobile data consumed by a telephone subscriber
CONTINUOUS Identify
whether each example describes a random sample. Answer with Yes or No Renmel
closes his eyes, opens a book and randomly points to a word on the page. She repeats the process for 30 times. No
The distribution that describes the spread of the means of
multiple samples from the sample population: Population Mean; Distribution
Error; Standard deviation of the distribution of the sample means; Sample
Distribution of sample means; Deviation Error; Statistics; Standard Deviation;
Parameter; Sampling Error; Mode; Sample; Mean; Standard Curve; Population;
Sample; Median; Random Sample Sample
Distribution of sample means
Given the following mean, compute for the Mean of Means. The
answer must have two decimal places. 4.5, 9.2, 9.1, 8.4 2.60
Who is the famous mathematician where the normal
distribution curve was named after?: William Gosset ; Carl Friedrich Gauss ;
John Tukey ; Ronald Fisher Carl
Friedrich Gauss
True or False: Sample Distribution of sample means is the
the distribution that describes the spread of the means of multiple samples
from the sample population TRUE
Which of the following random activity would you define as a
discrete random variable?: Height of students enrolled in an online course.;
Wind speed during typhoon.; None of the choices.; Distance travelled of a
tourist bus.; Depth of building excavation. None of the
choices.
Which of the following statement is TRUE.: All of the
statements are TRUE.; Countable number of values are called discrete variables;
Non-countable values are called discrete variables; Infinite numbers are
considered discrete variables. Countable number
of values are called discrete variables
Which of the following is CORRECT about Sample Space: Sample
space is a subset of events.; Sample space should be always be a number from
zero to one.; Sample space is also known as probability mass function.; Sample
space are possible outcomes Sample space are
possible outcomes
Given the set of data:
1, 1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the lower quartile : 3; 0; 8;
3,4,5,6,7,8,9,10,11,12, 8
Identify if the random variable is a DISCRETE or CONTINUOUS.
Internet speed in an office
CONTINUOUS
Given the following mean, compute for the Mean of Means. The
answer should be rounded off to the nearest hundredths. 3.2 3.6 3.9 9.2 1.65
True or False: Sampling Error is the degree of error
expected for a given sample design
TRUE Two dice is rolled and
the sum of face up is being recorded and represented as X. What is P(x <= 5)? 10
Which of the following is incorrect?: None of the choices;
Probability distribution is used to compute discrete random variables;
Probability distribution is used to compute continuous random variables;
Probability distribution equals to one.; Probability distribution equals to
zero. Probability distribution
equals to zero. This tells what the
possible values of X and how probabilities are assigned to these values. Probability
Distribution equals to zero
Normal Distribution Curve is also called: Basic Curve; All
of the choices; Arc-Shaped Curve; Bell Curve Basic Curve
Find the median of the following data set. 11, 13, 15, 17, 19, 21, 22, 23, 25, 27, 29,
31, 33, 35, 37, 39, 41, 43, 51, 53, 55, 57, 59 : 36.45; 30; 31; 24 31
Identify if the random variable is a DISCRETE or CONTINUOUS.
Speed of a tropical storm in the Philippines
CONTINUOUS
Given the set of data:
1,1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the upper quartile : 18; 0; 22;
13,14,15,14,15,16,17,18,19,20,21,22 18
Find the median of the following data set. 44, 46, 29, 39,
59, 59, 39: 44; (44 + 46 + 29 + 39 + 59 + 59 + 39)/2; 39; (44 + 46 + 29 + 39 +
59 + 59 + 39)/7 39
It is also called 68-95-99.7 Rule.: Empirical Rule; None of
the choices; Z score Rule; Variance Rule Empirical Rule
Use to check the normality of a distribution: Normal
quantile plot; Empirical Rule; Z score; None of the choices Normal quantile plot
True or False: Random distribution is the process of
assigning a number to each member of the population FALSE
Identify whether each example describes a random sample.
Answer with Yes or No. Collects the number of students who rides on the
train. Yes
How do you determine the value of the mean,: Multiply each
possible outcome of the random variables X by its associated probability and
the take the sum over all possible values of X.; Sum each possible outcome of
the random variables X by its associated probability and the take the product
of all possible values of X.; Multiply each possible outcome of the random
variables X by its associated probability and the take the square root of the
sum of all possible values of X.; None of the choices Multiply each possible outcome
of the random variables X by its associated probability and the take the sum
over all possible values of X.
A curve is said to be symmetric if all data points lies at
the right side of the curve.
A: false
As the confidence interval for a given statistic increases in
length, the confidence level decreases.
A: false
The mean of the normal distribution is: always equal to one;
always equal to zero; should always be a positive number; greater than or equal
to zero always equal
to zero
If the standard deviation of a population is 300, and
samples of 25 units each are taken, what is the Standard deviation of the
distribution of the sample means?
60
True or False: Random sample happened when data is collected
in no certain order TRUE
In a
normal curve, the bigger the values of standard deviation results to a: wider
curve; narrower curve; skewed to the right; skewed to the left; straight live
curve wider curve
True
or False: The larger the sample size the closer the sampling distribution was
to a normal distribution
TRUE
True or False: The Greek letter alpha represents the
mean. False
True or False: As the sample size increases, the standard
error increases. FALSE True or False: Mean is the sum of all
possible values of random variables.
False
Identify whether each example describes a random sample.
Answer with Yes or No Selects all areas in the Philippines who are affected by
typhoon and with 5th and 6th income class. Yes
In an IT Certification Examination, the mean was 75 and the
standard deviation was 5. If Pam z-scored is 1.5, what was her score in the
examination?: 82.50; 487.50; None of the choices; 117.50 82.50
It is a part of population intended to represent a
population as a whole.: Median; Sample; Mean; Mode; Sample; Standard Deviation;
Population Mean; Standard Curve; Deviation Error; Standard deviation of the
distribution of the sample means; Parameter; Statistics; Population; Random
Sample; Distribution Error; Sample Distribution of sample means; Sampling
Error Sample
Normal Distribution Curve is also called: Bell Curve; Basic
Curve; Arc-Shaped Curve; All of the choices Basic Curve
Given the following mean, compute for the Mean of Means. The
answer must have two decimal places. 4.5, 9.2, 9.1, 8.4 2.60
True or False: Sampling Error is the degree of error
expected for a given sample design
TRUE
Assuming z-score is 1, which of the following statement is
TRUE.: All values are equal to the mean.; All values are greater than the
mean.; All values are equal to the z-score; All values are less than the
mean. All values are greater than
the mean.
Identify if the random variable is a DISCRETE or CONTINUOUS.
Time travelled by an astronaut
CONTINUOUS
The process of assigning a number to each member of the
population: Random Sample; Population Mean; Median; Sample; Standard Curve;
Standard deviation of the distribution of the sample means; Sample; Sample
Distribution of sample means; Mean; Distribution Error; Sampling Error;
Population; Parameter; Statistics; Standard Deviation; Deviation Error;
Mode Random Sample
Salary, scores and age are examples of ____________ random
variables. Continuous
This is states that the percentages of data in a normal
distribution within 1,2 and 3 standard deviations.: Normal quantile plot;
Empirical Rule; Z score; None of the choices Empirical Rule
Which of the following statement is CORRECT?: A discrete
variable is a random variable where data can take infinitely many variables; A
continuous random variable assigns a whole number to each possible outcome of
an experiment; A discrete variable are countable number of possible values;
Continuous random variables are finite numbers A discrete variable are countable
number of possible values
Consider the given the probability distribution What is the
variance? : 2.466; 1.233; 1.99 ; 1.44
1.99
It is the difference between a sample statistic used to
estimate a population parameter and the actual but unknown value of the
parameter: Population Mean; Sample Distribution of sample means; Sample;
Distribution Error; Population; Mean; Sampling Error; Standard deviation of the
distribution of the sample means; Sample; Random Sample; Parameter; Standard
Curve; Median; Deviation Error; Mode; Standard Deviation; Statistics Sampling Error
True or False: People whose names were drawn out of the
survey is an example of a random sample
TRUE
Given the set of data:
1, 1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the lower quartile : 8; 0; 3;
3,4,5,6,7,8,9,10,11,12,
8
Given the set of data:
1,1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the upper quartile : 18;
13,14,15,14,15,16,17,18,19,20,21,22; 22; 0 18
A continuous random variable assigns a whole number to each
possible outcome of an experiment.: None of the choices; True; False; The
statement has insufficient information. True
t is the difference between a sample statistic used to
estimate a population parameter and the actual but unknown value of the parameter:
Statistics; Sample Distribution of sample means; Standard deviation of the
distribution of the sample means; Standard Curve; Sample; Standard Deviation;
Sampling Error; Mode; Population; Deviation Error; Random Sample; Median;
Parameter; Mean; Population Mean; Distribution Error; Sample Sampling Error
1. Given the data
set, find the Mean Value or Expected value (round off your answer to the
nearest tenths):
4.2
Identify whether each example describes a random sample.
Answer with Yes or No Renmel closes his eyes, opens a book and randomly points
to a word on the page. She repeats the
process for 30 times. No
Normal Distribution Curve is also called: Basic Curve;
Arc-Shaped Curve; Normal Curve; All of the choices Normal Curve
True or False: The bigger the sample size, the more closely
the samples will be clustered around the true value. TRUE
Identify if the random variable is a DISCRETE or CONTINUOUS.
Number of winning tournaments of a varsity team DISCRETE
This are numbers that summarizes data from a sample:
Distribution Error; Population; Parameter; Sample Distribution of sample means;
Deviation Error; Population Mean; Statistics; Sampling Error; Sample; Mode;
Standard Curve; Random Sample; Median; Standard deviation of the distribution
of the sample means; Sample; Standard Deviation; Mean Statistics
Identify if the random variable is a DISCRETE or CONTINUOUS.
Internet speed in an office
CONTINUOUS
The data set that approximates a normal distribution is
located at the left side of the curve wherein mean is greater than median.: The
statement is ALWAYS TRUE.; The statement is SOMETIMES TRUE.; None of the
choices.; The statement is INCORRECT The statement is INCORRECT
The range of probability is: can be any number (positive or
negative); from zero to any positive number; negative 1 to positive 1; from
zero to 1
from zero to 1
Identify whether each example describes a random sample.
Answer with Yes or No. The speed of internet in all areas in the Visayas
Region. Yes
Identify if the random variable is a DISCRETE or CONTINUOUS.
Total number of volunteers in a community DISCRETE
Find the median of the following data set. 11, 13, 15, 17, 19, 21, 22, 23, 25, 27, 29,
31, 33, 35, 37, 39, 41, 43, 51, 53, 55, 57, 59 : 24; 31; 36.45; 30 31
In an IT Certification Examination, the mean was 50 and the
standard deviation was 3. If Pam z-scored is 1, what was her score in the
examination?: 80.50; None of the choices; 53.00; 82.50 53.00
Find the median of the following data set. 44, 46, 29, 39,
59, 59, 39: 44; 39; (44 + 46 + 29 + 39 + 59 + 59 + 39)/7; (44 + 46 + 29 + 39 +
59 + 59 + 39)/2 39
Given the following sample data, compute for the true mean.
The answer must have two decimal places. 1 1 1 2 3 4 5 5 5 8 8 8 8 4.53
True or False: Standard deviation of the distribution of the
sample means is computed as the population standard deviation multiplied by the
square root of the sample size.
FALSE
Which one of these variables is a not continuous random
variable?: The number of volunteers in a community; The number of attendees in
an Information Technology conference.; The tuition fee enrolled in different
universities; The number of senators elected in the Philippines The number of volunteers in a
community
Given the following table, what is the correct computation
to find mean? : (0.30+0.20+0.10)/(0+1+2) ; (0+1+2)(0.30+0.20+0.10) ; (0)(0.30)
+ (1)(0.20) + (2)(0.10); (0.30+0.20+0.10)/3; None of the choices None of the choices
It is the measure of how many standard deviations below or
above the population mean.: Normal Distribution Measurement; Z-score; Median;
Empirical Rule Z-score
Identify whether each example describes a random sample.
Answer with Yes or No. Select all 100 poor households in a community in areas
in the Philippines affected by the earthquake. Yes
Identify if the random variable is a DISCRETE or CONTINUOUS.
Weight of students in a university CONTINUOUS
Identify whether each example describes a random sample.
Answer with Yes or No A survey company collects information on businessman in
Metro Manila on who will they vote for president on the next election. Yes
True or False: As the sample size increases, the standard
error increases. FALSE Identify if the random variable is a
DISCRETE or CONTINUOUS. Mobile data consumed by a telephone subscriber CONTINUOUS
True or False: People whose names were drawn out of the
survey is an example of a random sample
TRUE
In a given experiment, the sum of all probabilities is: One;
can be any number (positive or negative); Zero; All positive numbers One
Which of the following statement is CORRECT?: A discrete
variable are countable number of possible values; A discrete variable is a
random variable where data can take infinitely many variables; Continuous
random variables are finite numbers; A continuous random variable assigns a
whole number to each possible outcome of an experiment A discrete
variable are countable number of possible values
The weighted average of the possible values of random
variables.: Mode; Median; Mean; Standard Deviation; Variance Mean
The standard deviation of the normal distribution is: always
equal to zero; greater than or equal to zero; always equal to one; should
always be a positive number
always equal to one
Consider the given the probability distribution What is the
variance? : 1.233; 1.99 ; 1.44 ; 2.466
1.99
True or False: One of the most important characteristics of
any probability distribution is the mean. True
Given the data set 10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16,
how many numbers are in the lower quartile?: 1; 0; 4; 6 4
The mean of the normal distribution is: always equal to
zero; should always be a positive number; always equal to one; greater than or
equal to zero always equal to
zero
What is the probability distribution of occurring the all
heads in a toss of three coins?: 1; None of the choices; 0.1255; 0.25; 0 0.1255
What is the probability of getting all head when a three coins are
tossed? 1/8
Normal Distribution Curve is also called: Arc-Shaped Curve;
Normal Curve; Basic Curve; All of the choices Normal Curve
Normal Distribution Curve is also called: Arc-Shaped Curve;
All of the choices; Basic Curve; Bell Curve Basic Curve
True or False: Random distribution is the process of
assigning a number to each member of the population FALSE
Identify whether each example describes a random sample. Answer with Yes
or No The manager chooses 30 employees randomly from a department. Yes
Find the median of the following data set. 11, 13, 15, 17, 19, 21, 22, 23, 25, 27, 29,
31, 33, 35, 37, 39, 41, 43, 51, 53, 55, 57, 59 : 24; 30; 31; 36.45 31
Countless number of values are also known as _____________
variables. Continuous It is computed as the population
standard deviation divided by the square root of the sample size: Standard
deviation of the distribution of the sample means; Deviation Error; Sampling
Error; Mean; Standard Deviation; Mode; Statistics; Sample; Median; Random
Sample; Population; Standard Curve; Sample Distribution of sample means;
Population Mean; Sample; Parameter; Distribution Error Standard deviation of the
distribution of the sample means
How many possible outcomes when you simultaneously toss
three fair coins. 8
It is the measure of how many standard deviations below or
above the population mean.: Empirical Rule; Normal Distribution Measurement;
Z-score; Median Z-score
Given the set of data:
1,1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the upper quartile : 0; 18; 22;
13,14,15,14,15,16,17,18,19,20,21,22 18
Two dice is rolled and the sum of face up is being recorded
and represented as X. What is P(x <=
5)? 10
Identify whether each example describes a random sample.
Answer with Yes or No. Collects the election results in all areas in the
Philippines during election No
How many regions can be found at the left side of the normal
distribution curve?: 4; 2; 1; 3
3
True or False: The probability of an outcome that all heads
face up when fairly tossing three coin is 3/8.
False
Given the data set 10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16,
how many numbers are in the lower quartile?: 4; 0; 1; 6 4
This tells what the possible values of X and how
probabilities are assigned to these values. Probability Distribution
Which of the following applies to a normal distribution?:
Mean is greater than Median.; Median is greater than Mean.; None of the
choices; Data is exactly equal to the mean.; Exactly ½ of the data is above the
mean and ½ of data is below.
Exactly ½ of the data is above the mean and ½ of data is below.
The weighted average of the possible values of random
variables.: Mode; Median; Variance; Standard Deviation; Mean Mean
Which of the following is not a characteristics of a normal
distribution.: Bell-shaped; None of the choices; Perfectly asymmetric;
Mount-shaped distribution Perfectly asymmetric
Identify if the random variable is a DISCRETE or CONTINUOUS.
Number of proposed thesis in a university DISCRETE
Find the median of the following data set. 44, 46, 29, 39,
59, 59, 39: 44; (44 + 46 + 29 + 39 + 59 + 59 + 39)/7; 39; (44 + 46 + 29 + 39 +
59 + 59 + 39)/2 39
Identify whether each example describes a random sample.
Answer with Yes or No The manager chooses 30 employees randomly from a
department. Yes
True or False: Parameters are numbers that summarizes data
for an entire population TRUE
The probability distribution of a discrete random variable
is a graph, a table or a formula that specifies the probability associated with
each possible value that the random variable can assume.: The statement is
INCORRECT. The word “graph” should not be included in the statement.; The
statement is INCORRECT. The word “formula” should not be included in the statement.;
The statement is INCORRECT. The word “graph and formula” should not be included
in the statement.; The statement is ALWAYS CORRECT. The statement is ALWAYS
CORRECT.
What is the common symbol for the mean?: ∑; Α; Ω; µ µ
Normal Distribution Curve is also called: Bell Curve; All of
the choices; Basic Curve; Arc-Shaped Curve
Basic Curve
Identify whether each example describes a random sample.
Answer with Yes or No. Select all 100 poor households in a community in areas
in the Philippines affected by the earthquake. Yes
What is the probability distribution of occurring the all
heads in a toss of three coins?: 0.25; 0; 0.1255; 1; None of the choices 0.1255
It is also called 68-95-99.7 Rule.: Z score Rule; Empirical
Rule; Variance Rule; None of the choices Empirical Rule
The
standard deviation of the normal distribution is: greater than or equal to
zero; always equal to one; always equal to zero; should always be a positive
number always equal to
one
It is the difference between a sample statistic used to
estimate a population parameter and the actual but unknown value of the
parameter: Mean; Standard Deviation; Random Sample; Sampling Error; Standard
deviation of the distribution of the sample means; Sample Distribution of
sample means; Median; Parameter; Population Mean; Mode; Sample; Standard Curve;
Population; Distribution Error; Deviation Error; Sample; Statistics Sampling Error
It is the degree of error expected for a given sample
design: Population; Random Sample; Standard deviation of the distribution of
the sample means; Median; Sampling Error; Sample Distribution of sample means;
Sample; Deviation Error; Population Mean; Standard Deviation; Distribution
Error; Standard Curve; Sample; Parameter; Statistics; Mode; Mean Sampling Error
The distribution that describes the spread of the means of
multiple samples from the sample population: Population; Sample; Sample; Sample
Distribution of sample means; Deviation Error; Standard Deviation; Sampling
Error; Distribution Error; Median; Mode; Standard deviation of the distribution
of the sample means; Standard Curve; Population Mean; Statistics; Random
Sample; Mean; Parameter Sample Distribution of sample means
The distribution that describes the spread of the means of
multiple samples from the sample population.
Sample Distribution of sample means
Identify whether each example describes a random sample. Answer with Yes
or No Shake a bag of colored balls, reach in and select a marble with eyes
closed. Yes
True or False: The larger the sample size the closer the
sampling distribution was to a normal distribution TRUE
A fair six sided dice is tossed. The player loses 5 pesos if
the result is “1”, and loses P5 pesos if the result is a “6”, the rest of the
numbers, player wins P10. Which of the following table best describes the
problem? : None of the choices; ; ;
In an IT Certification Examination, the mean was 50 and the
standard deviation was 3. If Pam z-scored is 1, what was her score in the
examination?: 53.00; 80.50; None of the choices; 82.50 53.00
Identify whether each example describes a random sample.
Answer with Yes or No. Collects the number of students who rides on the
train. Yes
Identify whether each example describes a random sample.
Answer with Yes or No. Each audience in a game show is assigned a number from
111 to 666 and roll three standard dice to choose random contestants. Yes
What is the probability of getting the same numbers on 3
dice when they are thrown simultaneously?
1
Find the median of the following data set. 44, 46, 29, 39,
59, 59, 39: (44 + 46 + 29 + 39 + 59 + 59 + 39)/2; 44; (44 + 46 + 29 + 39 + 59 +
59 + 39)/7; 39 39
True or False: In Statistics, variance is defined as the
number of times an outcome can occur compared to all possible outcomes. False
Assuming z-score is 1, which of the following statement is
TRUE.: All values are less than the mean.; All values are equal to the z-score;
All values are equal to the mean.; All values are greater than the mean. All values are greater than the mean.
The range of probability is: from zero to any positive
number; negative 1 to positive 1; can be any number (positive or negative);
from zero to 1 from zero to 1
In a normal distribution curve,: Mean is equal to Median;
Mean is equal to Median and Mode; Mean is equal to Mode; None of the
choices Mean is equal to Median
and Mode
True or False: Variance is the degree to which values of a
random variable differ from the expected value. False
True
or False: To determine the value of the mean, multiply each possible outcome of
the random variables X by its associated probability and the take the sum over
all possible values of X. True
It is also called 68-95-99.7 Rule.: Variance Rule; None of
the choices; Z score Rule; Empirical Rule Empirical Rule
The probability distribution of a discrete random variable
is a graph, a table or a formula that specifies the probability associated with
each possible value that the random variable can assume.: The statement is
INCORRECT. The word “formula” should not be included in the statement.; The
statement is ALWAYS CORRECT.; The statement is INCORRECT. The word “graph and
formula” should not be included in the statement.; The statement is INCORRECT.
The word “graph” should not be included in the statement. The statement is ALWAYS CORRECT.
True or False: Mean of means is the sum of all means
multiplied by the number of means
FALSE
Identify if the random variable is a DISCRETE or CONTINUOUS.
Number of proposed thesis in a university DISCRETE
Identify whether each example describes a random sample.
Answer with Yes or No. Select all 100 poor households in a community in areas
in the Philippines affected by the earthquake. Yes
Identify whether each example describes a random sample.
Answer with Yes or No The manager chooses 30 employees randomly from a
department. Yes
Identify if the random variable is a DISCRETE or CONTINUOUS. Internet
speed in an office
CONTINUOUS
If the standard deviation of a population is 300, and
samples of 25 units each are taken, what is the Standard deviation of the
distribution of the sample means?
60
Identify whether each example describes a random sample.
Answer with Yes or No Select all registered voters in a community whose family
income is below 10,000 pesos. Yes
Which
of the following random activity would you define as a discrete random
variable?: Wind speed during typhoon.; Depth of building excavation.; Distance
travelled of a tourist bus.; None of the choices.; Height of students enrolled
in an online course. None of the
choices.
The
standard deviation of the normal distribution is: always equal to one; should
always be a positive number; greater than or equal to zero; always equal to
zero always equal to one What is the probability of getting the
same numbers on 3 dice when they are thrown simultaneously? 1
Consider the given the probability distribution What is the
variance? : 1.99 ; 1.44 ; 1.233; 2.466
1.99
Identify whether each example describes a random sample.
Answer with Yes or No Shake a bag of colored balls, reach in and select a
marble with eyes closed. Yes
Consider the given the probability distribution The value of
the mean is ________. : 4.100 ; 1.233 ; 2.466; 0.082 4.100
A continuous random variable assigns a whole number to each
possible outcome of an experiment.: None of the choices; False; True; The
statement has insufficient information. True
A representative subset of a population: Random Sample;
Deviation Error; Standard Curve; Population Mean; Sample Distribution of sample
means; Standard deviation of the distribution of the sample means; Distribution
Error; Median; Sampling Error; Mean; Population; Sample; Sample; Standard
Deviation; Statistics; Parameter; Mode Sample
Which of the following statement is TRUE.: All of the statements
are TRUE.; Non-countable values are called discrete variables; Countable number
of values are called discrete variables; Infinite numbers are considered
discrete variables. Countable
number of values are called discrete variables
The process of assigning a number to
each member of the population: Population Mean; Parameter; Sampling Error;
Standard Deviation; Sample; Distribution Error; Statistics; Random Sample;
Mean; Sample Distribution of sample means; Standard Curve; Sample; Mode;
Deviation Error; Median; Standard deviation of the distribution of the sample
means; Population
Random Sample
Find the median of the following data set. 44, 46, 29, 39,
59, 59, 39: 39; (44 + 46 + 29 + 39 + 59 + 59 + 39)/2; (44 + 46 + 29 + 39 + 59 +
59 + 39)/7; 44 39
Identify whether each example describes a random sample. Answer with Yes
or No. Collects the number of students who rides on the train. Yes
True or False: Mean of means is the sum of all means
multiplied by the number of means
FALSE
The data set that approximates a normal distribution is
located at the left side of the curve wherein mean is greater than median.: The
statement is INCORRECT; The statement is SOMETIMES TRUE.; None of the choices.;
The statement is ALWAYS TRUE. The statement is
INCORRECT
It is the measure of how many standard deviations below or
above the population mean.: Empirical Rule; Median; Z-score; Normal
Distribution Measurement
Z-score
Find the median of the following data set. 11, 13, 15, 17, 19, 21, 22, 23, 25, 27, 29,
31, 33, 35, 37, 39, 41, 43, 51, 53, 55, 57, 59 : 36.45; 31; 24; 30 31
Which of the following is CORRECT about Sample Space: Sample
space is a subset of events.; Sample space are possible outcomes; Sample space
is also known as probability mass function.; Sample space should be always be a
number from zero to one.
Sample space are possible outcomes
True or False: The probability of an outcome that all heads
face up when fairly tossing three coin is 3/8.
False
Which of the following random activity would you define as a
discrete random variable?: Depth of building excavation.; Wind speed during
typhoon.; None of the choices.; Distance travelled of a tourist bus.; Height of
students enrolled in an online course.
None of the choices.
How many regions can be found at the left side of the normal
distribution curve?: 3; 2; 4; 1
3
Identify if the random variable is a DISCRETE or CONTINUOUS.
Internet speed in an office
CONTINUOUS
Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, how many numbers are in the
lower quartile?: 0; 1; 6; 4 4
Identify if the random variable is a DISCRETE or CONTINUOUS.
Mobile data consumed by a telephone subscriber CONTINUOUS
Who is the famous mathematician where the normal
distribution curve was named after?: Carl Friedrich Gauss ; John Tukey ; Ronald
Fisher ; William Gosset Carl Friedrich
Gauss
The speed of cars travelling in the road and the water
consumption of household are examples of: Continuous Discrete Random Variable;
Discrete Continuous Random Variable; Continuous Random Variable; None of the
choices; Discrete Random Variables
Continuous Random Variable
Given the data set
10,11,11,12,12,12,13,13,13,13,24,24,14,15,15,16, find the upper quartile:
13,13,24,24,14,15,15,16; 24; 16; 14 14
The sum of all the probabilities P(X = x) for all possible
values of a discrete random variable X must equal 1.: The statement is NOT
ALWAYS TRUE; The statement is FALSE.; The statement is TRUE.; The statement is
NOT ALWAYS FALSE The statement is
TRUE.
Identify if the random variable is a DISCRETE or CONTINUOUS.
Weight of students in a university CONTINUOUS
rue or False: As the sample size increases, the standard
error increases. FALSE
In a
normal curve, the mean is located at the: midpoint of the curve; intersection
of the lowest and highest point; lowest point of the curve; highest point of
the curve highest point of the
curve
Which of the following is incorrect?: Probability
distribution equals to zero.; Probability distribution is used to compute
discrete random variables; Probability distribution is used to compute
continuous random variables; None of the choices; Probability distribution
equals to one. Probability
distribution equals to zero.
True or False: Sampling Error is the degree of error
expected for a given sample design
TRUE Identify whether each
example describes a random sample. Answer with Yes or No. Collects the election
results in all areas in the Philippines during election No
What is the common symbol for the mean?: ∑; Ω; Α; µ µ
True or False: One of the most important characteristics of
any probability distribution is the mean. True
True or False: The formula of mean is relative to compute
for the variance. True
True or False: Random sample happened when data is collected
in no certain order TRUE
Given the set of data:
1, 1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the lower quartile : 8; 0; 3;
3,4,5,6,7,8,9,10,11,12, 8
True or False: Variance Error is the difference between a
sample statistic used to estimate a population parameter and the actual but
unknown value of the parameter FALSE
True or False: The probability of an outcome that all heads
face up when fairly tossing three coin is 3/8.
False
Which of the following statement is TRUE.: Non-countable
values are called discrete variables; Countable number of values are called
discrete variables; All of the statements are TRUE.; Infinite numbers are
considered discrete variables.
Countable number of values are called discrete variables
The speed of cars travelling in the road and the water
consumption of household are examples of: None of the choices; Discrete Random
Variables; Continuous Random Variable; Continuous Discrete Random Variable;
Discrete Continuous Random Variable Continuous Random
Variable
Identify whether each example describes a random sample. Answer with Yes
or No A survey company collects information on businessman in Metro Manila on
who will they vote for president on the next election. Yes
Identify whether each example describes a random sample.
Answer with Yes or No. A teacher conducts examination to all his students. No The sum of all the prob
abilities P(X = x) for all possible values of a discrete
random variable X must equal to ______.
1
The data set that approximates a normal distribution is
located at the left side of the curve wherein mean is greater than median.: The
statement is SOMETIMES TRUE.; The statement is ALWAYS TRUE.; The statement is
INCORRECT; None of the choices. The
statement is INCORRECT
True
or False: In Statistics, variance is defined as the number of times an outcome
can occur compared to all possible outcomes. False
In a normal distribution curve, data are divided into 3
equal parts.: The statement is FALSE.; The statement is SOMETIMES TRUE
depending on the data set.; None of the choices; The statement is TRUE. None of the choices
Identify whether each example describes a random sample.
Answer with Yes or No Select all registered voters in a community whose family
income is below 10,000 pesos. Yes
Two dice is rolled and the sum of face up is being recorded
and represented as X. What is P(x <=
5)? 10
An example of a parameter.: Population Mean; Sample Distribution
of sample means; Standard deviation of the distribution of the sample means;
Random Sample; Population; Mode; Sample; Median; Mean; Deviation Error;
Standard Curve; Statistics; Parameter; Distribution Error; Standard Deviation;
Sample; Sampling Error Population
Mean
Given the set of data:
1, 1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22 Find the lower quartile :
3,4,5,6,7,8,9,10,11,12,; 3; 8; 0 8
Given the set of data:
1,1, 2, 2, 3, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22
How many numbers are in the lower quartile? : 10; 0; 3,4,5,6,7,8,9,10; 6 6
How do you determine the value of the mean,: Multiply each
possible outcome of the random variables X by its associated probability and
the take the square root of the sum of all possible values of X.; Multiply each
possible outcome of the random variables X by its associated probability and
the take the sum over all possible values of X.; None of the choices; Sum each
possible outcome of the random variables X by its associated probability and
the take the product of all possible values of X. Multiply each possible outcome of the
random variables X by its associated probability and the take the sum over all
possible values of X.
Given the following sample data, compute for the true mean.
The answer must have two decimal places. 1 1 1 2 3 4 5 5 5 8 8 8 8 4.53 Find the median of the following data
set. 44, 46, 29, 39, 59, 59, 39: 39; 44; (44 + 46 + 29 + 39 + 59 + 59 + 39)/7;
(44 + 46 + 29 + 39 + 59 + 59 + 39)/2
39
Identify if the random variable is a DISCRETE or CONTINUOUS.
Internet speed in an office
CONTINUOUS
This are numbers that summarizes data for an entire
population: Parameter; Standard Deviation; Distribution Error; Sample;
Population Mean; Median; Mode; Sample; Sampling Error; Standard deviation of
the distribution of the sample means; Deviation Error; Random Sample; Standard
Curve; Sample Distribution of sample means; Statistics; Population; Mean Parameter
Which of the following applies to a normal distribution?:
None of the choices; Median is greater than Mean.; Mean is greater than Median.;
Data is exactly equal to the mean.; Exactly ½ of the data is above the mean and
½ of data is below. Exactly ½ of the
data is above the mean and ½ of data is below.
Identify if the random variable is a DISCRETE or CONTINUOUS.
Total number of volunteers in a community DISCRETE
True or False: Random sample happened when data is collected
in no certain order TRUE
Find the median of the following data set. 11, 13, 15, 17, 19, 21, 22, 23, 25, 27, 29,
31, 33, 35, 37, 39, 41, 43, 51, 53, 55, 57, 59 : 31; 36.45; 30; 24 31
The mean of the normal distribution is: greater than or
equal to zero; always equal to one; should always be a positive number; always
equal to zero always equal to
zero
True or False: The probability variance of a discrete random
variable is a graph, a table or a formula that specifies the probability
associated with each possible value that the random variable can assume. False
In a normal
distribution curve,: Mean is equal to Mode; Mean is equal to Median; None of
the choices; Mean is equal to Median and Mode Mean is equal to Median and Mode
The sum of all the probabilities P(X = x) for all possible
values of a discrete random variable X must equal to ______. 1
It is the difference between a sample statistic used to
estimate a population parameter and the actual but unknown value of the
parameter: Parameter; Mean; Sample; Mode; Distribution Error; Standard
deviation of the distribution of the sample means; Median; Sampling Error;
Deviation Error; Standard Deviation; Standard Curve; Population; Population
Mean; Statistics; Sample Distribution of sample means; Sample; Random Sample Sampling Error
Identify whether each example describes a random sample.
Answer with Yes or No. The speed of internet in all areas in the Visayas
Region. Yes
It is the number of times an outcome can occur compared to
all possible outcomes.: Probability; Standard Deviation; Variance; Mean
Probability
Identify if the random variable is a DISCRETE or CONTINUOUS.
The brightness of an LED bulb
CONTINUOUS
It is
also called 68-95-99.7 Rule.: Z score Rule; None of the choices; Empirical Rule;
Variance Rule Empirical Rule
This are numbers that summarizes data from a sample: Random
Sample; Statistics; Population Mean; Sample; Deviation Error; Population;
Standard Deviation; Parameter; Sample Distribution of sample means; Sample;
Standard Curve; Mode; Median; Sampling Error; Standard deviation of the
distribution of the sample means; Distribution Error; Mean Statistics
Identify if the random variable is a DISCRETE or CONTINUOUS.
Internet speed in an office
CONTINUOUS
Use to check the normality of a distribution: None of the
choices; Normal quantile plot; Z score; Empirical Rule Normal quantile plot
Which of the following statement is TRUE.: All of the
statements are TRUE.; Non-countable values are called discrete variables;
Countable number of values are called discrete variables; Infinite numbers are
considered discrete variables.
Countable number of values are called discrete variables
Identify if the random variable is a DISCRETE or CONTINUOUS.
Total number of volunteers in a community DISCRETE
Identify if the random variable is a DISCRETE or CONTINUOUS.
Mobile data consumed by a telephone subscriber CONTINUOUS
Identify whether each example describes a random sample.
Answer with Yes or No Women who volunteer to take a survey on human
rights. No
Which one of these variables is a not continuous random
variable?: The number of senators elected in the Philippines; The number of
volunteers in a community; The tuition fee enrolled in different universities;
The number of attendees in an Information Technology conference. The number of senators
elected in the Philippines
Identify whether each example describes a random sample.
Answer with Yes or No. Collects the number of students who rides on the
train. Yes
True or False: Mean is the sum of all possible values of
random variables.
False
The sum of all the probabilities P(X = x) for all possible
values of a discrete random variable X must equal to ______. 1
Two dice is rolled and the sum of face up is being recorded
and represented as X. What is P(x <=
5)? 10
Identify whether each example describes a random sample.
Answer with Yes or No A survey company collects information on businessman in
Metro Manila on who will they vote for president on the next election. Yes
The sum of all the probabilities P(X = x) for all possible
values of a discrete random variable X must equal 1.: The statement is FALSE.;
The statement is NOT ALWAYS TRUE; The statement is TRUE.; The statement is NOT
ALWAYS FALSE The statement is TRUE.
An example of a parameter.: Standard Deviation; Sample;
Random Sample; Standard deviation of the distribution of the sample means;
Mode; Median; Sampling Error; Standard Curve; Population Mean; Statistics;
Parameter; Distribution Error; Deviation Error; Mean; Sample; Sample
Distribution of sample means; Population
Population Mean
The
speed of cars travelling in the road and the water consumption of household are
examples of: Discrete Continuous Random Variable; Continuous Random Variable;
Continuous Discrete Random Variable; Discrete Random Variables; None of the choices Continuous Random Variable
True or False: Sample Distribution of sample means is the
the distribution that describes the spread of the means of multiple samples
from the sample population TRUE
1. Given the data set below, compute for the variance.
(Round off your answer to the nearest hundredths):
A: 5.98
The degree of error expected for a given sample design
A: sampling error
This is defined by two values, between which a population
parameter is said to lie.
A: interval estimate
Which of the following applies to Central Limit Theorem?
A: Distribution of sample means may be assumed normal as
long as sample size is greater than or equal to 30.
These are numbers that summarizes data from a sample.
A: statistics
The average of the population.
A: mean
Confidence interval is associated by confidence level
A: true
In Central Limit Theorem, the mean of the sampling
distribution of the mean is equal to the
A: population mean
Which of the following does describes a T distribution?
A: all of the choices
In order to apply the Central Limit Theorem, which of the
statement applies?
A: A sample size greater than or equal to 30
Margin of Error is computed as quotient of the standard
deviation and the ____________ of the sample size multiplied by the confidence
coefficient.
A: square root
In a normal distribution curve, the total area of the curve
is
A: 1
Number of rooms & employees are examples of
_________________.
A: Discrete Random Variables
What is the formula to calculate the standard deviation of
the sampling distribution?
A: Standard deviation of the population divided by the
square root of the sample size
The mean of sample should fall ________________ the lower
and upper values of the confidence interval.
A: within
Which of the following describes a T distribution?
A: all of the choices
As the confidence interval for a given statistics increases
in length,
A: confidence level increases
T distribution is use to estimate population mean interval
for:
A: Smaller samples
In a normal curve, z-score is ______________.
A: Always equal to zero.
Also known as Bell shaped curve.
A: normal curve
In a normal distribution, the tail of the curve __________
along the horizontal axis.
A: flatten
According to the
Empirical Rule, ________ % of the sample estimates will fall within one
standard error above the population parameter.
The process of assigning a number to each member of the
population
A: Random Sampling